Chemistry Review

Front

What is a valence electron?

Back

Electrons in the outermost energy level of an atom.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Front

List the elements in order of smallest to largest ionization energy: P, Cs, Co, Sr.

Back

Cs, Sr, Co, P.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Front

Which element has a higher first ionization energy: Ra or Fr?

Back

Ra has a higher first ionization energy than Fr because Ra has a larger nuclear charge.

Tags

NGSS.HS-PS1-1

Front

What family in the periodic table is the most reactive?

Back

Alkali Metals (Group 1).

Front

How does shielding vary across period 3 from sodium to argon?

Back

There is no significant variation.

Front

Define ionization energy.

Back

The energy required to remove an electron from an atom in the gas phase.

Front

What is electronegativity?

Back

A measure of the tendency of an atom to attract a bonding pair of electrons.

Front

Which group of elements is known for having a full outer shell?

Back

Noble Gases (Group 18).

Front

What is the trend of atomic radius across a period?

Back

Atomic radius decreases from left to right across a period.

Front

What is the trend of atomic radius down a group?

Back

Atomic radius increases down a group.