UNIT 2 - Review

Front

What determines the number of energy levels in an atom?

Back

The number of energy levels in an atom is determined by the number of electrons it has.

Front

How many valence electrons does magnesium have?

Back

Magnesium typically has 2 valence electrons.

Front

Which element is the most reactive: Bromine, Silicon, Nickel, or Krypton?

Back

Bromine is the most reactive among these elements.

Front

What is the mass number of an element with 5 protons, 6 neutrons, and 8 electrons?

Back

The mass number is 11 (5 protons + 6 neutrons).

Front

Which element is the best conductor of electricity: Bromine, Silicon, Nickel, or Krypton?

Back

Nickel is the best conductor of electricity among these elements.

Front

Define protons.

Back

Protons are positively charged particles found in the nucleus of an atom.

Front

Define neutrons.

Back

Neutrons are neutral particles found in the nucleus of an atom.

Front

Define electrons.

Back

Electrons are negatively charged particles that orbit the nucleus of an atom.

Front

What is a valence electron?

Back

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

Front

What is the significance of the atomic number?

Back

The atomic number indicates the number of protons in an atom and determines the element's identity.