Atomic structure and periodic table practice quiz

Which is the best definition of an atom?

• The smallest unit of a substance that maintains its properties.

• The smallest unit of an element that maintains its properties.

• A substance that cannot be broken down in to simpler substances.

• Any sample that has definite chemical and physical properties.

Which statement about the atomic nucleus is most correct?

• The nucleus is made of protons and neutrons and has a negative charge.

• The nucleus is made of protons and neutrons and has a positive charge.

• The nucleus is made of electrons and has a positive charge.

• The nucleus is made of electrons and has a negative charge.

The [electric] charge of a proton is

• -2

• 0

• +1

• -1

The [electric] charge of a neuton is

• -3

• 0

• -1

• +1

The [electric] charge of a electron is

• -1

• +1

• +2

• 0

Atoms [that are neutral] are said to have no electric [+ or -] charge because they:

• have an equal number of charged and non-charged particles.

• have neutrons in their nuclei.

• have an equal number of electrons and protons.

• have an equal number of neutrons and protons.

Tags

NGSS.MS-PS1-1

Which atomic particles have approximately the same mass [atomic mass unit, AMU]?

• protons and neutrons

• protons and electrons

• neutrons and electrons

• proton, neutron and electron

What information can you get from the atomic number of an element?

• The number of protons.

• The number of neutrons.

• the number of particles in the nucleus.

• the number of electrons only.

What information can you get from the atomic mass of an element?

• The number of protons only.

• The number of neutrons only.

• The number of particles in the nucleus.

• The number of electrons only.

The element Lithium (Li) has 3 protons, how many electrons will a stable non-ionized [no charge] atom have?

• 5

• 2

• 3

• 9