Chemistry Semester 1 Final

Front

What did Mendeleev predict by placing question marks in his periodic table?

Back

He predicted that future elements would be found that would fit in those spaces.

Front

What are the components of an atom?

Back

Protons, neutrons, and electrons.

Front

How does the size of atoms change as you move across the periodic table from left to right?

Back

Atoms tend to get smaller because they have more protons.

Front

If an atom has 6 electrons, how many protons does it have?

Back

It has 6 protons.

Front

What is the mass number of an atom with 6 protons and 6 neutrons?

Back

The mass number is 12.

Front

What happens to the energy of a ball when a football player kicks it?

Back

The ball gains kinetic energy and the particles move faster.

Front

Define atomic number.

Back

The atomic number is the number of protons in the nucleus of an atom.

Front

What is the relationship between protons and electrons in a neutral atom?

Back

In a neutral atom, the number of protons equals the number of electrons.

Front

What is kinetic energy?

Back

Kinetic energy is the energy of an object in motion.

Front

What is potential energy?

Back

Potential energy is the stored energy of an object due to its position or state.