Asked by scienze
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.
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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.
Answers
Answered by
scienze
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.
Answered by
scienze
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
Answered by
scienze
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
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