Answer:
c. valence electrons
Explanation:
characteristics of mixtures
Answer:
The mixture has no fixed composition.
To form a mixture energy is neither produced nor evolved.
The mixture has no fixed melting points and boiling points.
the Mixture retains the properties of its components.
Components of mixtures can be separated by simple physical methods.
Oxygen cannot be broken
down into a different
substance. What can we call
oxygen?
Answer:
• Oxygen is an element
Answer:
We can call it an element.
yall help, i missed like a week
some of them are wrong, I need all of 1 and 2
Answer:
a. Azane
b. sulphur hexachloride
c.carbon tetrachloride
d. Carbon disulfide
e.Umbelliferone
f.Disilicon hexabromide
g. Dinitrogen trifluoride
h.
why do we think mercury has so many tremendous cliffs?
Which of the following properties is a chemical property?
Answer:
flammability, toxicity, acidity, reactivity are some examples.
sorry you left out your options.
Answer:
Where are the options
Explanation:
Can you be a little more specific about your question?
A student makes two mixtures, both made of the same substances. What must be true of the two mixtures? A Both mixtures have the same density. B Both mixtures have the same temperature. C Both mixtures can be physically separated into its components. D Both mixtures are physically combined in the same proportions.
A student makes two mixtures, both made of the same substances. Both mixtures can be physically separated into its components. Therefore, option C is correct.
What is mixture ?A substance made up of two or more separate chemical compounds that are not chemically linked is referred to as a mixture. A mixture is the physical blending of two or more substances while maintaining their distinct identities. It can take the form of solutions or suspensions.
A pure substance is a single sort of matter that cannot be divided into other kinds of matter by any physical methods. A pure substance has a known and consistent composition at all times.
When two or more distinct substances physically join, a mixture is produced that can be dispersed back into its constituent parts. When two or more compounds combine to create a new substance that cannot be broken down into its constituent parts, a chemical reaction takes place.
Thus, option C is correct.
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If a planet's distance from the Sun is doubled, which of the following is true?
The orbital period increases.
The orbital period increases.
The eccentricity of its orbit increases.
The eccentricity of its orbit increases.
The average speed of the orbiting planet increases.
The average speed of the orbiting planet increases.
The gravitational force between the planet and the Sun increases.
Answer:
La fuerza gravitacional entre el planeta y el Sol aumenta.
Explanation:
how is an ionic compound made up of charged particles can be electrically neutral
Answer:
Ionic compounds are electrically neutral because the charges of the cations and anions that make up the compound cancel each other out. In the case of salt for example, sodium has a charge of positive one, and chloride has a charge of negative one. Together, they neutralize the compound.
Explanation:
What syndrome did you researched
The nucleus’ pull on its electrons, taking into account any attractions weakened by shielding is called the:
Answer:
It's called the shielding effect
Explanation:
It describes the decrease in attraction between an electron and the nucleus in any atom with more than one electron shell. (I hope this helps)
The attraction pull of the nucleus on its electron weakened by the shielding of the inner shell electron is called the shielding effect.
What is the shielding effect?The shielding effect is the valence electrons are shielded from the attraction toward the nucleus of an atom. The shielding effect is the resistance offered by the inner shell electrons to the attraction of the valence electrons toward the nucleus.
This effect increases down the group in the periodic table as the atomic radii also increase and remains the same in the period. This effect is generated by the electrons present in the middle of the nucleus and valence electrons act as shields that repel those outer electrons.
Therefore, the effective nuclear charge acting on the valence electrons decreases. More shielding effect causes less electronegativity of an atom. The shielding effect describes how easily the electron can be removed from the atom making it more reactive.
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Convert 1.00 us gallon in kilometer (kL)
ANSWER ASAP
PLeAsE
?????????????
Answer:
The answer is A.) leaving a copper penny in vinegar until it turns green.
All the other options are physical changes, as you can separate the two mixtures.
I hope this helps you! :)
If greenhouse gases in the atmosphere act like a blanket around the Earth, how is this "blanket” being changed by human activities?
It is getting thinner and keeping the Earth cooler.
It is getting thicker and keeping the Earth cooler.
It is getting thicker and keeping the Earth warmer.
It is getting thinner and keeping the Earth warmer.
Answer:
It is getting thicker and keeping the Earth warmer.
Answer:
it is getting thinner and keeping the earth warmer
which scenario supports the ""one gene–one enzyme"" hypothesis of metabolic disease causation?
The scenario that supports the "one gene-one enzyme" hypothesis of metabolic disease causation is Phenylketonuria (PKU). This disease (PKU) is caused by the failure to produce a functional variant of an enzyme.
Phenylketonuria (PKU) is a metabolic inherited disorder associated with a decreased metabolism of the amino acid phenylalanine.
PKU is caused by a mutation in the gene responsible for encoding a key enzyme needed to break down phenylalanine.
Untreated PKU may lead to diverse health problems which include brain damage, intellectual disability, seizures, mental disorders, etc.
Learn more in:
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Groundwater that soaks into the ground is sometimes stored in underground layers. These underground layers can be used as
water sources. Humans extract this water by digging, driving, boring, or drilling wells into the ground and then pumping the water
out.
What are these underground water storage areas called?
O A. aquifers
OB. deltas
O C. watersheds
OD. drainage basins
Answer:
the answer is A) aquifers
Answer:
Aquifers
Explanation:
as you move across the periodic table atoms tend to get smaller because
Answer: because atoms have more protons
Explanation: just took the test
A compound formed from a metal and a non-metal will have which type of bond?
A. Covalent
B. Hydrogen
C. Ionic
D. Atomic
it's an ionic bond
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1. Given the word equation:
sodium chlorate → sodium chloride + oxygen
Which type of chemical reaction is represented by
this equation?
A) double replacement
B) single replacement
C) decomposition
D) synthesis
Answer:
Decompositon
Explanation:
Sodium chlorate → Sodium Chloride + Oxygen
Sodium chlorate is reactant.
Sodium chloride + Oxygen is the product.
Definition : -
Decomposition reaction is a chemical reaction in which a single reactant breaks down to simpler products.
1. ___is the speed and direction of movement.
1 Acceleration
2Density
3Velocity
4Work
Answer:
VELOCITY
Explanation:
VELOCITY IS THE SPEED AND DIRECTION OF MOVEMENT
Explanation:
velocity
reason: The velocity of an object is the rate of change of its position with respect to a frame of reference, and is a function of time. Velocity is equivalent to a specification of an object's speed and direction of motion (e.g. 60 km/h to the north).
19 What is the number of moles of nitrogen gas which react with 18 g of magnesium to form magnesium nitride compound ? [Mg = 24,N=14]
a) 0.25 mol 0 b) 0.5 mol C) 1 mol d) 2 mol
Answer:
0.5 mol of nitrogen gas.
Explanation:
18g of Magnesium in mol is equal to 18g/24 gmol-1 = 0.75 mol and 7g of nitrogen in mol is equal to 7g/14 gmol-1 = 0.5 mol,
Thus, When 18g of magnesium reacts with 7g of nitrogen it implies 0.75 mol of magnesium which reacts with 0.5 mol of nitrogen. :)
The number of moles of nitrogen gas which react with 18 g of magnesium
to form magnesium nitride compound is 0.5mol.
We need to find the number of mole for magnesium and nitrogen.
Mole= mass/molar mass
Magnesium= 18g/24gmol⁻¹ = 0.75mol of Mg
Nitrogen= 7g/14gmol⁻¹ = 0.5mol of N
This implies that when 18g of magnesium reacts with 7g of nitrogen it
means 0.75 mol of magnesium which reacts with 0.5 mol of nitrogen.
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Using the periodic table, explain which pair of the following gases have the most similar properties and why. Nitrogen (N), Fluorine (F), Neon (Ne), Krypton (Kr), and Oxygen (O).
Your future is affected by your choices today? I agree or disagree
Answer:
The choice that we had decided on doing today factors our future because whatever choice we decide on doing in the present day can impact how our life will play out in the future. ... After all, it is your life, so whatever you chose to do, you have the power to decide and create what you think would be best for you
Explanation:
hello can anyone help me with this question thx
Answer:
A. W and X
Explanation:
Because W have just one valence electron, and X have 7, so it means that W will give its electron to X and that's the definition of an ionic bond
PLSSS HELP MEEE ASAPA!!
Which pair of elements has reactivity that is similar to Fluorine, F?
Answer:
halogens group 7A on the periodic
table
Someone pls help me I will make you brain
Answer:
It is true answer. Ozone = O3
All live things (plants included) must turn food into _________ that can be used (___________), and then release waste products.
Earth science!
Answer:
I think it is
1. energy
2. respiration
Is there a relationship between atomie radius and electronegativity? Why or why not?
Answer:
Yes
Explanation:
Electronegativity is the tendency for atoms to keep electrons closer to them. So, if the atoms are smaller there, there is a stronger pull on the electrons to keep them closer. So, the larger the atom get, due to electron shielding, it become less electro negative. I hope this help. You might get a better explanation from Khan Academy's video on Electronegativity
Answer:
A relationship is intuitively expected
Does electronegativity relate to atomic radius? A relationship is intuitively expected between electronegativity and radius: the size of an atom is determined by the distribution of electrons around its nucleus. The closer the electrons are to the nucleus, the more tightly they are bound, thus increasing the electronegativity of the atom.
Explanation:
I will make you brainless answer this 1 question pleaaeeee!
C. Point 3
Explanation:
Because it is increasing dramatically
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Potassium, K, forms a compound with fluorine, F
Which statements about this compound are correct?
1) The compound is ionic.
2) The formula of the compound is KF.
3) The compound is soluble in water.
A) 1 2 and 3
B) 1 and 2 only.
C) 1 and 3 only
D) 2 and 3 only
Answer:
A ) 1, 2 and 3
Explanation:
1 ) is correct because,
K donates 1 electron
F gain 1 electron from K.
If donating and gaining of electrons takes place between two electron, then type of compound formed is ionic.
2 ) is correct because,
K + F -----> KF
3 ) is correct because,
KF is soluble in cold water; very soluble in hot water.
An element X exists in three forms A, B and C in the ratio 1:2:3. If C has 10 protonsand the number of neutrons in A, B and C are 10, 11 and 12 respectively,Give the following:(i) Representation of form C of the element X(ii) Electronic configuration of form B of the element(iii) Calculate the average atomic mass.
x21 +ANSWER
(i) Ne-22
(ii)1s2s22p6
(iii)21.3
An element X exists in three forms A, B and C in the ratio 1:2:3. If C has 10 protons and the number of neutrons in A, B and C are 10, 11 and 12 respectively,Give the following:(i) Representation of form C of the element X(ii) Electronic configuration of form B of the element(iii) Calculate the average atomic mass.
(i)C has 10 protons and 12 neutrons so a mass of 10 +12 =22
element 10 is Neon (Ne) so this isotope is Ne-22
(ii) they all have the sane atomic number so the same number of electrons
with an electronic structure of 1s2s22p6
(iii) A weighs 20, B weighs 21, C weighs 22
the ratio is 1:2:3
weighted average weight is therefor
(1X20 +2X21 +3X22)/6 =21.3