Basic Chem. for Bio Students!

Front

What are hydrogen bonds?

Back

Weak attractions between water molecules that cause them to cling together.

Front

How many protons are in a potassium atom?

Back

19 protons.

Front

What is a neutron?

Back

A subatomic particle found within the nucleus, has a neutral charge, and a mass of 1.

Front

How many neutrons are in a potassium atom?

Back

20 neutrons.

Front

What is a molecule?

Back

A combination of two or more atoms held together by chemical bonds.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom, which defines the element.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.

Front

What is the mass number of an atom?

Back

The total number of protons and neutrons in the nucleus of an atom.

Front

What is a covalent bond?

Back

A type of chemical bond where two atoms share one or more pairs of electrons.

Front

What is an ionic bond?

Back

A type of chemical bond formed through the transfer of electrons from one atom to another, resulting in the formation of charged ions.