What do elements in the same column (group) on the periodic table have in common?
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They have the same number of protons.
They have similar chemical properties.
They have the same atomic mass.
They have the same physical state at room temperature.
7 answers
They have similar chemical properties.
Which statement best represents the Law of Conservation of Mass?
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2 points
Matter can disappear in a chemical reaction.
The total mass of substances stays the same a chemical reaction.
The mass of a substance increases during a physical change.
Mass conservation only applies to gases.
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2 points
Matter can disappear in a chemical reaction.
The total mass of substances stays the same a chemical reaction.
The mass of a substance increases during a physical change.
Mass conservation only applies to gases.
The total mass of substances stays the same in a chemical reaction.
Which one shows a chemical change?
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2 points
Rust on a lock.
Chopping wood for a fire
Mixing cake batter and water.
Boiling water
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2 points
Rust on a lock.
Chopping wood for a fire
Mixing cake batter and water.
Boiling water
Rust on a lock.
Atoms are tiny particles of matter that are made up of three particles. Which particles are located in the nucleus?
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2 points
electrons, protons & neutrons
protons & neutrons
elements & neutrons
neutrons
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2 points
electrons, protons & neutrons
protons & neutrons
elements & neutrons
neutrons
Protons and neutrons are located in the nucleus.
1 answer