Periodic Trends

Front

What is atomic radius?

Back

The atomic radius is the distance from the nucleus of an atom to the outermost shell of electrons. It generally increases down a group and decreases across a period.

Front

Which element has the largest atomic radius among Ga, Al, and Si?

Back

Gallium (Ga) has the largest atomic radius among these elements.

Front

What is ionization energy?

Back

Ionization energy is the energy required to remove an electron from an atom in its gaseous state. It generally increases across a period and decreases down a group.

Front

Put the following elements in order of increasing ionization energy: Lithium, Carbon, Neon.

Back

Lithium, Carbon, Neon.

Front

Which element has a lower ionization energy than Scandium (Sc)?

Back

Calcium (Ca) has a lower ionization energy than Scandium.

Front

What group of elements has the greatest number of valence electrons?

Back

Group 18 has the greatest number of valence electrons, which is 8.

Front

Define a metal in the context of the periodic table.

Back

A metal is an element that is typically shiny, malleable, ductile, and a good conductor of heat and electricity. Metals are found on the left side and in the center of the periodic table.

Front

What is the trend of atomic radius as you move down a group in the periodic table?

Back

The atomic radius increases as you move down a group due to the addition of electron shells.

Front

What is the trend of ionization energy as you move across a period from left to right?

Back

Ionization energy generally increases as you move from left to right across a period due to increasing nuclear charge.

Front

What are valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in chemical bonding.