B.2.1 The Nature of Matter

Front

What is a charged atom called?

Back

An ion is a charged atom that has gained or lost one or more electrons.

Front

What type of bond forms when electrons are shared between nonmetals?

Back

Covalent bonds form when electrons are shared between nonmetals.

Front

What do you call a substance created when two or more elements combine chemically in specific ratios?

Back

A compound is formed when two or more elements combine chemically in specific ratios.

Front

What type of bond forms when electrons are transferred from one atom to another?

Back

Ionic bonds form when electrons are transferred between atoms.

Front

What is the term for the number of protons in the nucleus of an atom?

Back

The atomic number is the number of protons in the nucleus of an atom.

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 an isotope?

Back

An isotope is a variant of an element that has the same number of protons but a different number of neutrons.

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together, which can be of the same or different elements.

Front

What is the significance of the atomic mass?

Back

The atomic mass is the weighted average mass of an element's isotopes, reflecting the relative abundance of each isotope.

Front

What is a hydrogen bond?

Back

A hydrogen bond is a weak attraction between a hydrogen atom covalently bonded to an electronegative atom and another electronegative atom.