Answer:
Anything not on the periodic table is an element non example! ... So, for a substance to be an element, all of its atoms must have the same number of protons. Examples of elements include hydrogen, lithium, nickel, and radium.
Explanation:
Non-examples of an atom refer to entities that are not considered atoms.
Molecules consist of two or more atoms chemically bonded together. They are not considered individual atoms because they contain multiple atoms connected by chemical bonds.
Ions are electrically charged particles formed when atoms gain or lose electrons. They can be positively charged (cations) or negatively charged (anions).
Subatomic particles are the constituents of atoms. They include protons, neutrons, and electrons.
Compounds are substances composed of two or more different elements chemically combined.
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Oxygen can be produced in the laboratory by the reaction
2KClO3———-> 2KCl+3O2
How much potassium chlorate is needed to produce 2.75 L of oxygen, collected over water at 37°C and 94.9 kPa? The vapor pressure of water at 37°C is 6.28 kPa.
Answer:
5.2g potassium chlorate is needed to do so
Which is larger 1.45 or 1.2544 for density
Answer:
1.45 is larger for density
Pleaseee helppp!! Pleaseee
Answer:
10CO²+4H²O
Explanation:
that Brainliest me pls
Someone pls help me I will make you brain
Answer:
B I and II
Explanation:
warming and melting.
please mark me brainliest
Someone pls help me I will make you brain
Answer: B
Explanation:
Put in order from smallest to largest radii:
1. AI, Na, CI, Ar, Mg
2. S, Te, Po, Se, O
3. Cl, Ca, S, P, Ga, Mg
4. F, CI, Br, I, At
Answer:
1. Ar, Cl, Al, Mg, Na
2. O, S, Se, Te, Po
Explanation:
Just remember the trends. From left to right, atomic radius decreases because proton increases and pulls electrons closer. From top to bottom, atomic radius increases because there are more electron shells.
wants to help?
it's agriculture science not chemistry
Answer:
the jamaians need food to survive
Explanation:
Franklin added a solid yellow dye tablet to each of these beakers one beaker (A) contained cold water, and the other beaker contained (B) hot water he took this picture after ten seconds to compare the results. What is the most likely investigating? Answer a. He is investigating the effect temperature has the movement of molecules.
b.he is investigating how food coloring tablets affect the temperature of water
c.he is investigating how to how to create new colors by mixing two or more or more other colors
d. he is investigation the effects of evaporation on water mixed with colored tablets
Answer:
a
Explanation:
a
Which of these statements is false?
A. Electrons have a negative charge
B. Electrons have a mass of 1 amu
C. The nucleus of an atom is positively charged
D. The neutron is found in the nucleus of an atom
Answer:
The answer is b
Explanation:
Hope it helps
b) electrons have a mass of 1 amu
electrons have a mass of 0 amu
How many protons does silicon have?
28
2
14
28.08
Answer:
14
Explanation:
Difference Between baking soda and baking powder
Answer:
Baking soda is sodium bicarbonate, which requires acid and a liquid to become activated and help baked goods rise. Conversely, baking powder includes sodium bicarbonate, as well as an acid. It only needs a liquid to become activated. Substituting one for the other is possible with careful adjustments. Baking soda is strong. In fact, it is about 3-4x stronger than baking powder. More baking soda in a recipe doesn't necessarily mean more lift.
Explanation:
Explanation:
baking soda contains one ingredient, sodium bicarbonate. however, baking powder contains sodium bicarbonate , monocalcium phosphate and either sodium acid prophetess or sodium aluminum sulfate
* What element has an electron configuration of
1s2 2s2 2p6 3s2 3p6 4s2 and which block is it in? Use the periodic table.
Answer:
phosphorus
Explanation:
14. An atom has 10 protons, 8 electrons, and 7 neutrons. What is the charge of the
atom and what type of ion is it?
The charge on an atom = # of protons - # of electrons
= 10 - 8
= +2
∴ the atom is a CATION (ion) of +2 charge.
(ii)
Copper and potassium have different melting points and boiling points.
Give one other difference between the properties of copper and potassium.
Answer:
ExplanationWhat are the properties of potassium?
Image result for give one other difference between the properties of copper and potassium
Potassium metal is soft and white with a silvery lustre, has a low melting point, and is a good conductor of heat and electricity. Potassium imparts a lavender colour to a flame, and its vapour is green. It is the seventh most abundant element in Earth's crust, constituting 2.6 percent of its mass.:
Difference between copper and potassium is the valence electron of sodium is in the 3s orbital whereas the valence electron of potassium is in the 4s orbital.
What are the properties of potassium?Potassium metal is soft and white with a silvery luster, has a low melting point, and is a good conductor of heat and electricity.
What are the properties of copper?It is malleable, ductile, and an extremely good conductor of both heat and electricity. It is softer than zinc and can be polished to a bright finish.
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Which of these is known as a push or pull upon an object that results from its interaction with another object?
Answer:
b
Explanation:
Answer:
force or velocity
Explanation:
I am not sure
what the differenve between ionisation and dissociation
What is the. chemical formular name of rusting?
Answer:
Iron(III) oxide
Explanation:
Why is formula equation more meaningful than a word equation?
The formula equation is more meaningful than a word equation because the word equation only defines what the reactants and products are, whereas the formula equation defines which and how much of each element is present in the chemicals and also give some indication as to their structure.
Answer:
The formula equation is more meaningful than a word equation because the word equation only defines what the reactants and products are, whereas the formula equation defines which and how much of each element is present in the chemicals and also give some indication as to their structure
Explanation:
The formula equation is more meaningful than a word equation because the word equation only defines what the reactants and products are, whereas the formula equation defines which and how much of each element is present in the chemicals and also give some indication as to their structure
Please help serious answers only
Answer:
Neptune and Saturn although Neptune isn't on there so just Saturn.
hope it'll help ya out!
Potassium and bromine combine to make KBr. What is the name of this compound?
potassium bromine
potassium bromide
bromine potassium
bromine potassiumide
Please answer quickly
which alkyl halide reacts fastest with trimethylamine in sn2 reaction?
Structure V reacts fastest with trimethylamine in SN2 reaction. Owing to less steric crowding in the transition state and ease of cleavage of the R - I bond
The question is incomplete, the complete question is shown in the image attache to this answer.
SN2 reaction is a type of nucleophilic reaction in which the nucleophile attacks the substrate from the reverse side. This is a synchronous reaction because the leaving group departs as the entering group attacks simultaneously in a hypervalent transition state.
SN2 reaction is favored by structure V owing to less steric crowding in the transition state and the easy of cleavage of the R - I bond. Hence, structure V reacts fastest with trimethylamine in SN2 reaction.
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how many atoms of hydrogen are in 4Ca(OH)2
Explanation:
there are 8 atoms of hydrogen
NEED HELP ASAP. Write a statement explaining your claim about whether or not the equation is correctly balanced.
Then, provide evidence that supports your claim about whether or not the equation is correctly
balanced. Next, connect your evidence to your claim about the equation.
Answer:
Explanation:
Hi! can you add the choices.
item 3 steel is an alloy containing fe atoms and c atoms. which of the following diagrams best represents the particle-level structure of steel?
An alloy is obtained when an element is combined with another physically and not chemically. The image that accurately represents steel is the image in which carbon atoms are sandwiched between iron atoms.
Steel is an alloy of iron and carbon. In an alloy, the atoms one element is sandwiched in between atoms of another element in its crystal. Usually, allows are formed to improve certain desired properties of substances. The percentage of carbon included in steel depends on its intended use.
The image that can be used to represent the formation of steel is the image shown in B. In that image, small atoms of carbon are seen sandwiched between larger iron atoms. That is the accurate description of steel.
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C) equally shared and form nondirectional bonds
Explanation:In metals, electrons are free to move as described by the electron sea model. Electrons are shared equally among atoms, and the structure is based on simple close-packed structures that contain no fixed directional bonds.
Bases react with carbon dioxide and from............. and water
Answer:
I believe the answer is B. Carbonates
Explanation:
A cube measuring 1cm x 1cm x 1cm is full of water, What is the mass of the water in the cube? (Water has a density of 1.0)
d= m/v
1.0=m/1cm^3
1.0×1cm^3=m
m=1kg/cm^3
It takes 40 mL of 0.10 M of hydrochloric acid (HCl) to neutralize 50 mL of sodium hydroxide (NaOH) for the following chemical reaction
HCl + NaOH → NaCl + H2O
The concentration of sodium hydroxide is _____.
0.125 M
0.08 M
0.10 M
0.04 M
Answer:
0.08 M
Explanation:
here...
1. water and a salt
2. Magnesium hydroxide reacts with HCl to produce a solution that is neutral.
3. titrant
4. 0.08 M
5. indicator
{quizlet: captncrun}
The concentration of sodium hydroxide is 0.08 M. The correct option is the second option 0.08 M
From the question,
We are to determine the concentration of sodium hydroxide
The given reaction is
HCl + NaOH → NaCl + H₂O
This means
1 mole of HCl is required to completely neutralize 1 mole of NaOH
To determine the concentration of sodium hydroxide,
We will use the formula
[tex]\frac{C_{A}V_{A} }{C_{B}V_{B}} = \frac{n_{A}}{n_{B}}[/tex]
Where
[tex]C_{A}[/tex] is the concentration of acid
[tex]C_{B}[/tex] is the concentration of base
[tex]V_{A}[/tex] is the volume of acid
[tex]V_{B}[/tex] is the volume of base
[tex]n_{A}[/tex] is the mole ratio of acid
[tex]n_{B}[/tex] is the mole ratio of base
From the give information
[tex]C_{A} = 0.10 \ M[/tex]
[tex]V_{A} = 40 \ mL[/tex]
[tex]V_{B} = 50 \ mL[/tex]
From the balanced chemical equation
[tex]n_{A} = 1[/tex]
[tex]n_{B} = 1[/tex]
Putting the above parameters into the formula, we get
[tex]\frac{0.10 \times 40}{C_{B} \times 50} = \frac{1}{1}[/tex]
Then
[tex]C_{B} \times 50 = 0.10 \times 40[/tex]
∴ [tex]C_{B}=\frac{0.1 \times 40}{50}[/tex]
[tex]C_{B}=\frac{4}{50}[/tex]
[tex]C_{B}=0.08[/tex]
Hence, the concentration of sodium hydroxide is 0.08 M. The correct option is the second option 0.08 M
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CAN SOMEONE HELP IT WOULD MEAN THE MOST??!!!
An atom will be neutral ONLY if
Answer:
They have the same number of charged protons and electrons, therefore balancing positive and negative charges. I hope this helps you.
Explanation: