CIA #1 Review

Front

What is the charge of a sodium ion (Na)?

Back

+1

Front

Define half-life in the context of radioactive decay.

Back

The time required for half of a substance to decay.

Front

How many neutrons are present in Uranium-238 (U-238) if its atomic number is 92?

Back

146

Front

Which elements form an ionic bond: Sodium (Na) and Fluorine (F) or Carbon (C) and Oxygen (O)?

Back

Sodium (Na) and Fluorine (F)

Front

What process is responsible for the energy produced by the sun?

Back

Nuclear fusion

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is an ionic bond?

Back

A chemical bond formed between two ions with opposite charges.

Front

What is the significance of half-life in nuclear chemistry?

Back

It helps determine the stability and decay rate of radioactive isotopes.

Front

What is the difference between atomic mass and atomic number?

Back

Atomic mass is the weighted average mass of an element's isotopes, while atomic number is the number of protons.

Front

What type of reaction occurs during nuclear fusion?

Back

Two light atomic nuclei combine to form a heavier nucleus, releasing energy.