CHEM '23 MIDTERM

Front

As you move down the periodic table, atoms get bigger because ____________.

Back

The atoms have more energy levels.

Front

What is the term for an atom that has a neutral charge?

Back

Atom.

Front

Which element has the largest electronegativity in the halogens?

Back

Fluorine (F).

Front

What does the law of conservation of mass state?

Back

Matter cannot be created nor destroyed; it can only be transformed or changed.

Front

Why are noble gases generally not reactive?

Back

Their outer electron (valence) level is filled.

Front

What is an ion?

Back

An atom or molecule that has a net electric charge due to the loss or gain of one or more electrons.

Front

Define isotope.

Back

Atoms of the same element that have the same number of protons but different numbers of neutrons.

Front

What is electronegativity?

Back

A measure of the tendency of an atom to attract a bonding pair of electrons.

Front

What is the significance of valence electrons?

Back

They determine an atom's chemical properties and its ability to bond with other atoms.

Front

What is the periodic trend for atomic size?

Back

Atomic size increases down a group and decreases across a period.