Atomic structure

What is the role of neutrons in an atom?

• Neutrons help stabilize the nucleus by offsetting the repulsive forces between protons.

• Neutrons are responsible for the chemical properties of an atom.

• Neutrons determine the atomic number of an element.

• Neutrons are involved in the formation of chemical bonds.

How many protons does Boron have?

• 3 protons

• 5 protons

• 7 protons

• 4 protons

Where are protons located in an atom?

• In the nucleus of an atom.

• In the electron cloud surrounding the nucleus.

• In the outer shell of the atom.

• In the neutron cloud.

Where are electrons located in an atom?

• In the nucleus of the atom.

• In the electron cloud surrounding the nucleus.

• In the protons of the atom.

• In the neutron shell of the atom.

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

• Protons are significantly heavier than neutrons.

• Protons and neutrons have approximately the same mass, but protons are slightly lighter.

• Neutrons are lighter than protons.

• Protons have no mass compared to neutrons.

What is the electron configuration of Sodium?

• 1s² 2s² 2p⁶ 3s¹

• 1s² 2s² 2p⁶ 3p¹

• 1s² 2s² 3s²

• 1s² 2s² 2p⁶ 3s² 3p¹

How many electrons does Sodium have?

• 10 electrons

• 11 electrons

• 12 electrons

• 9 electrons

What is the significance of the atomic mass?

• It is the total number of protons in an atom.

• It is the weighted average mass of an element's isotopes, reflecting the relative abundance of each isotope.

• It determines the color of the element in a chemical reaction.

• It is the mass of an atom in grams.

What charge do protons have?

• Negative charge

• No charge

• Positive charge

• Neutral charge

What is the atomic number?

• The number of neutrons in an atom

• The number of protons in the nucleus of an atom

• The total number of electrons in an atom

• The mass of an atom in atomic mass units