Periodic Table

Front

What is the basic unit of matter?

Back

Atoms are the basic unit of matter.

Tags

NGSS.MS-PS1-1

Front

What does the atomic number represent?

Back

The atomic number represents the number of protons in an atom.

Front

How can you find the atomic number of an element on the periodic table?

Back

The atomic number is usually located at the top of the element's square on the periodic table.

Front

What is the significance of the atomic number in identifying an element?

Back

The atomic number uniquely identifies an element and determines its position in the periodic table.

Front

What particle in an atom has a positive charge?

Back

Protons have a positive charge.

Front

What is the charge of an electron?

Back

Electrons have a negative charge.

Tags

NGSS.MS-PS2-3

Front

What is the mass of a neutron compared to a proton?

Back

Neutrons have a mass approximately equal to that of protons, but they have no charge.

Front

What is the relationship between protons and electrons in a neutral atom?

Back

In a neutral atom, the number of protons equals the number of electrons.

Front

What does the term 'isotope' refer to?

Back

Isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons.

Front

How do you determine the number of neutrons in an atom?

Back

The number of neutrons can be determined by subtracting the atomic number from the atomic mass.