Atom or Molecule?

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element. It consists of a nucleus made of protons and neutrons, surrounded by electrons.

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together, representing the smallest fundamental unit of a chemical compound.

Front

How many atoms are in a molecule of Sr3(PO4)2?

Back

13

Front

How many copper ions are in a molecule of Cu2SO4?

Back

2

Front

What is the difference between an atom and a molecule?

Back

An atom is a single unit of an element, while a molecule is a combination of two or more atoms bonded together.

Front

What is a chemical formula?

Back

A chemical formula is a way of expressing information about the proportions of atoms that constitute a particular chemical compound.

Front

What does the subscript in a chemical formula indicate?

Back

The subscript indicates the number of atoms of the element in the molecule. For example, in H2O, the '2' indicates there are two hydrogen atoms.

Front

What is a compound?

Back

A compound is a substance formed when two or more different elements are chemically bonded together.

Front

What is the significance of parentheses in a chemical formula?

Back

Parentheses in a chemical formula indicate that the atoms inside the parentheses are grouped together and may be multiplied by a subscript outside the parentheses.

Front

What is the molecular weight of a compound?

Back

The molecular weight is the sum of the atomic weights of all the atoms in a molecule.