B 8-9 2024-2025 Atomic Structure Pre-Assessment

Front

What happens to the particles of matter when the temperature increases?

Back

The particles speed up and move farther apart.

Front

What is atomic mass?

Back

The total number of protons and neutrons in an atom's nucleus.

Front

How many protons are in a sodium atom (Na)?

Back

Sodium has 11 protons.

Front

If boron has an atomic number of 5 and an atomic mass of 11, how many neutrons does it have?

Back

Boron has 6 neutrons.

Front

What is the atomic number of an element?

Back

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

Front

What is the relationship between temperature and particle movement in matter?

Back

As temperature increases, particle movement increases.

Front

What is the formula to calculate the number of neutrons in an atom?

Back

Number of neutrons = Atomic mass - Atomic number.

Front

What is the significance of protons in an atom?

Back

Protons determine the element's identity and its atomic number.

Front

What does a higher atomic mass indicate about an atom?

Back

A higher atomic mass indicates more protons and/or neutrons in the nucleus.

Front

How do you find the atomic mass of an atom?

Back

The atomic mass is found by adding the number of protons and neutrons.