Unit Three Review

Front

What is the electron configuration of Ca⁺²?

Back

1s2 2s2 2p6 3s2 3p6

Front

As you move down the periodic table, why do atoms get bigger?

Back

Atoms have more energy levels.

Front

Which two atoms have similar properties?

Back

Fluorine (F) and Chlorine (Cl) have similar properties.

Front

What is incorrect about this orbital diagram?

Back

There should be 1 electron (arrow) in the first 2p box and one in the 2nd 2p box.

Front

Which of the following is an Alkali Metal?

Back

Sodium (Na) is an Alkali Metal.

Front

Define electron configuration.

Back

Electron configuration is the distribution of electrons in an atom's orbitals.

Front

What is the significance of energy levels in an atom?

Back

Energy levels determine the size and energy of an atom; more levels mean larger atoms.

Front

What are the main characteristics of Alkali Metals?

Back

Alkali Metals are highly reactive, have one electron in their outermost shell, and are soft.

Front

Explain the concept of atomic radius.

Back

Atomic radius is the distance from the nucleus to the outermost electron shell.

Front

What trend is observed in atomic radius across a period?

Back

Atomic radius decreases across a period due to increased nuclear charge.