Periodic Table

Front

What is the octet rule?

Back

The octet rule states that atoms tend to gain, lose, or share electrons in order to have eight electrons in their valence shell, achieving a stable electron configuration.

Front

What is an atomic number?

Back

The atomic number is a unique number for each element that equals the number of protons in an atom of that element.

Front

Which element has a full valence shell with only two electrons?

Back

Helium (He) has a full valence shell with two electrons.

Front

What is electronegativity?

Back

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

Front

Which element has a greater electronegativity than arsenic (As)?

Back

Carbon (C) has a greater electronegativity than arsenic (As).

Front

What is the trend in atomic radius across a period?

Back

The atomic radius decreases across a period from left to right due to increasing nuclear charge.

Front

Which element in Period 2 has the greatest atomic radius?

Back

Lithium (Li) has the greatest atomic radius in Period 2.

Front

What happens to electronegativity as you move down a group in the periodic table?

Back

Electronegativity generally decreases as you move down a group in the periodic table.

Front

What is the relationship between atomic radius and electronegativity?

Back

Atoms with smaller atomic radii tend to have higher electronegativity because the nucleus can attract bonding electrons more effectively.

Front

What is a valence shell?

Back

The valence shell is the outermost shell of an atom that contains the valence electrons.