Inv. 4 and 5 Fast and Curious

Front

What causes the colors in fireworks according to the quantum mechanical model?

Back

Excited electron transitions from higher energy levels to lower energy levels.

Front

If an atom GAINS electrons, it would be _______.

Back

Larger.

Front

Which subatomic particles account for most of an atom's mass and volume?

Back

Protons and neutrons.

Front

Cations have a ______ charge because they have _____ electrons.

Back

Positive, lost.

Front

Most of the elements on the periodic table are classified as _____

Back

Metals.

Front

What is the charge of an electron?

Back

Negative.

Front

What is the charge of a proton?

Back

Positive.

Front

What is the nucleus of an atom composed of?

Back

Protons and neutrons.

Front

What is an anion?

Back

A negatively charged ion formed by gaining electrons.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.