Warm Up (12-16-24)

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

How many valence electrons does an element with atomic number 15 have?

Back

An element with atomic number 15 (Phosphorus) has 5 valence electrons.

Front

What is the electron configuration for chlorine (atomic number 17)?

Back

The electron configuration for chlorine is 2, 8, 7, meaning it has 2 electrons in the first shell, 8 in the second, and 7 in the third.

Front

How many unpaired electrons does sulfur have?

Back

Sulfur has 2 unpaired electrons.

Front

What does the Bohr model of the atom state about electron motion?

Back

The Bohr model assumes that all electrons move in circular orbits around the nucleus.

Front

How many electrons does a neutral atom of argon have?

Back

A neutral atom of argon has 18 electrons.

Front

What is the significance of valence electrons in chemical bonding?

Back

Valence electrons are the outermost electrons and are involved in forming bonds with other atoms.

Front

What is the maximum number of electrons that can occupy the first energy shell?

Back

The maximum number of electrons in the first energy shell is 2.

Front

What is the electron configuration for an atom with 10 electrons?

Back

The electron configuration for an atom with 10 electrons (Neon) is 2, 8.

Front

What is the difference between core electrons and valence electrons?

Back

Core electrons are the inner electrons that are not involved in bonding, while valence electrons are the outermost electrons that participate in chemical reactions.