Chemistry Chapter

Aristotle named atoms atoms.

• True
• False

The stream of particles in a cathode ray tube consists of protons

• True
• False

In a neutral atom, the number of protons is equal to the number of electrons

• True
• False

Isotopes are forms of an element that have the same number of protons but different number of electrons.

• True
• False

The mass of a neutron is approximately equal to the mass of a proton

• True
• False

A proton is a subatomic particle carrying a charge equal to but opposite that of an electron

• True
• False

Cathode rays are deflected towards a negatively charged plate in an electric field.

• True
• False

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

In the visible light spectrum, red light has a greater frequency than violet light.

• True
• False

Tags

NGSS.HS-PS4-1

The unit for measuring the energy of a wave is hertz

• True
• False

An element can be identified by the characteristic bright-line atomic emmission spectrum it can produce

• True
• False

Tags

NGSS.HS-PS4-3