Exploring Matter and Atomic Structure

What are the three states of matter?

• solid, liquid, plasma

• gas, liquid, crystal

• solid, liquid, gas

• plasma, vapor, foam

What is the charge of a proton?

• 0 elementary charge

• -1 elementary charge

• +1 elementary charge

• +2 elementary charge

Who proposed the plum pudding model of the atom?

• Niels Bohr

• J.J. Thomson

• Albert Einstein

• Ernest Rutherford

What did Ernest Rutherford discover about the nucleus?

• The nucleus is large and contains only electrons.

• The nucleus is primarily made of empty space.

• The nucleus has no charge and is very light.

• The nucleus is small, dense, and contains most of the atom's mass and positive charge.

Who is known for the planetary model of the atom?

• James Chadwick

• J.J. Thomson

• Ernest Rutherford

• Niels Bohr

What particle did James Chadwick discover?

• electron

• positron

• neutron

• proton

What are energy levels in an atom?

• Energy levels in an atom are the quantized states where electrons can exist at fixed distances from the nucleus.

• Energy levels are the physical size of an atom.

• Energy levels are the total energy of an atom's nucleus.

• Energy levels refer to the temperature of an atom.

Define sublevels in atomic structure.

• Sublevels are divisions within electron shells, designated as s, p, d, and f, each with specific shapes and electron capacities.

• Sublevels are unrelated to electron capacity.

• Sublevels only exist in the f-block elements.

• Sublevels are the same as electron shells.

Which of the following subatomic particles is negatively charged and orbits the nucleus of an atom?

• A. Proton

• B. Neutron

• C. Electron

• Positive

Which of the following subatomic particles has a neutral charge and is found in the nucleus of an atom?

• A. Electron

• B. Proton

• C. Neutron

• D. Ion