Unit 1 Part 1 Review Honors

Front

What is the product of the nuclear decay of Bismuth-209?

Back

The product is Helium-4 (\(^{4}_{2}He\)) and Thallium-205 (\(^{205}_{81}Tl\)).

Front

True or False: The atom is mostly empty space with two regions, the nucleus and the electron cloud.

Back

True

Front

True or False: Electrons are positively charged particles.

Back

False. Electrons are negatively charged particles.

Front

What is the symbol for an atom with 18 neutrons, 16 electrons, and a net charge of 0?

Back

The symbol is \(^{34}_{16}S\).

Front

When a nucleus undergoes nuclear decay by gamma rays, what happens to the atomic number of the element?

Back

The atomic number remains the same.

Front

What is the charge of an electron?

Back

The charge of an electron is -1.

Front

Define the nucleus of an atom.

Back

The nucleus is the central part of an atom, containing protons and neutrons.

Front

What is the role of neutrons in the nucleus?

Back

Neutrons help stabilize the nucleus and contribute to the atomic mass.

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom.

Front

What is the mass number of an atom?

Back

The mass number is the total number of protons and neutrons in the nucleus.