Periodic Table

What is the charge of a proton?

• Zero

• Negative

• Positive

• Neutral

How many electrons can the first energy level hold?

• 2

• 8

• 6

• 4

Define isotopes.

• Atoms of the same element with different numbers of protons.

• Atoms of the same element with different numbers of neutrons.

• Atoms of different elements with the same number of neutrons.

• Atoms of different elements with different numbers of protons.

How many protons are in the nucleus of an oxygen atom?

• 4

• 8

• 10

• 6

Explain the concept of electron shells.

• Electron shells are energy levels where electrons orbit around the nucleus of an atom.

• Electron shells are the physical shells of electron-shaped structures.

• Electron shells are the shells of electrons found in the ocean.

• Electron shells are layers of protective coating on atoms.

What is the atomic number of an element?

• The atomic number of an element is a unique identifier for that element and is typically denoted by the letter Z.

• The atomic number of an element is the number of protons and neutrons combined.

• The atomic number of an element is always equal to the number of electrons.

• The atomic number of an element is determined by its mass.

How do you determine the number of neutrons in an atom?

• Number of neutrons = Atomic mass number - Atomic number

• Number of neutrons = Atomic number - Atomic mass number

• Number of neutrons = Atomic mass number + 2

• Number of neutrons = Atomic number + Atomic mass number

Compare and contrast Bohr models and Lewis structures.

• Bohr models focus on electron orbits and energy levels, while Lewis structures emphasize electron sharing and bonding.

• Bohr models are used for ionic compounds, while Lewis structures are used for covalent compounds.

• Bohr models describe the arrangement of protons and neutrons, while Lewis structures describe electron movement.

• Bohr models focus on electron configuration, while Lewis structures focus on molecular geometry.

How many valence electrons this element have?

• 2

• 6

• 8

• 4

The atomic mass of an element is equal to its electrons.

• True

• False