H.Chem- 70% Review- Units 4 & 5: Electron Config & PT

Front

What is the electron configuration for aluminum?

Back

1s²2s²2p⁶3s²3p¹

Front

Which element has the lowest electronegativity in Period 3?

Back

Ar (Argon)

Front

What is the trend in electronegativity and metallic properties across Period 3 from left to right?

Back

Electronegativity increases and metallic properties decrease.

Front

Which element has more valence electrons than fluorine and fewer energy levels than sodium?

Back

Ne (Neon)

Front

How many valence electrons are present in an element with 14 electrons and 14 protons?

Back

4

Front

Define electron configuration.

Back

The distribution of electrons in an atom's orbitals.

Front

What are valence electrons?

Back

Electrons in the outermost shell of an atom that determine its chemical properties.

Front

What is electronegativity?

Back

A measure of an atom's ability to attract and hold onto electrons.

Front

What is the periodic trend for atomic radius across a period?

Back

Atomic radius decreases from left to right across a period.

Front

What is the significance of the periodic table?

Back

It organizes elements based on their atomic number, electron configurations, and recurring chemical properties.