The Structure of the Atom

In standard nuclear notation, what does X represent?

• The position of the element of the periodic table

• The name of the element

• The chemical symbol for the element

• The date of discovery of the element

In standard nuclear notation, what does A represent?

• The number of nucleons

• The number of neutrons

• The number of protons

• The number of electrons

Tags

NGSS.HS-PS1-8

In standard nuclear notation, what does Z represent?

• The number of nucleons

• The number of neutrons

• The number of protons

• The number of electrons

A certain element is known to exist as two different isotopes.

State one thing that is the same for atoms of both isotopes.

• The number of protons

• The number of nucleons

• The number of neutrons

• The number of quarks

A certain element is known to exist as two different isotopes.

State all the differences for atoms of both isotopes.

• The number of protons

• The number of nucleons

• The number of neutrons

• The number of electrons

Tags

NGSS.HS-PS1-8

An atom of one of the isotopes of sodium contains:

11 protons, 11 electrons and 13 neutrons

Which of these will be the same in neutral atoms of all isotopes of sodium?

• 11 protons

• 11 electrons

• 13 neutrons

• The chemical symbol

Tags

NGSS.MS-PS1-1

An atom of one of the isotopes of sodium contains:

11 protons, 11 electrons and 13 neutrons.

State the nucleon number of this isotope.

• 11

• 13

• 24

• 35

Which statement about the chemical properties of different isotopes of sodium is correct?

• The chemical properties of different isotopes of sodium are the same.

• The chemical properties of different isotopes of sodium differ depending on the number of neutrons.

• The chemical properties of different isotopes of sodium differ depending on the number of electrons.

• The chemical properties of different isotopes of sodium differ depending on the number of nucleons.

One isotope of sodium is ²⁵Na

How many neutrons are there in one atom of this isotope?

• 11

• 14

• 25

• 36

The most abundant stable isotope of strontium is strontium-88.

How many nucleons are there in a nucleus of strontium-88?

• 38

• 50

• 88

• 126

Tags

NGSS.HS-PS1-8