Search for Life- Lessons 5 & 6 Review

Front

What does it mean that oxygen forms a -2 ion?

Back

Oxygen gains 2 electrons when becoming an ion.

Front

What has to happen for chlorine to form CaCl2?

Back

Chlorine has to gain 1 electron.

Front

How many energy levels does aluminum have in its Bohr model?

Back

Aluminum's Bohr model should have 3 energy levels.

Front

How many valence electrons will sulfur have after becoming a sulfur ion?

Back

Sulfur will have 8 valence electrons after becoming a sulfur ion.

Front

What is the charge of the sulfur ion?

Back

The charge of the sulfur ion is -2.

Front

What is a valence electron?

Back

A valence electron is an electron in the outermost shell of an atom that can participate in chemical bonding.

Front

How do you determine the charge of an ion?

Back

The charge of an ion is determined by the difference between the number of protons and electrons in the atom.

Front

What is the significance of the octet rule in chemistry?

Back

The octet rule states that atoms tend to gain, lose, or share electrons to achieve a full outer shell of 8 electrons.

Front

What is the Bohr model of the atom?

Back

The Bohr model is a representation of the atom that depicts electrons orbiting the nucleus in defined energy levels.

Front

What happens to an atom when it gains electrons?

Back

When an atom gains electrons, it becomes negatively charged and is called an anion.