Atoms and the Periodic Table

What is the atomic structure of an atom?

• The atomic structure of an atom consists of a nucleus containing electrons and neutrons, surrounded by protons in energy levels or shells.

• The atomic structure of an atom consists of a nucleus containing electrons and protons, surrounded by neutrons in energy levels or shells.

• The atomic structure of an atom consists of a nucleus containing protons and electrons, surrounded by neutrons in energy levels or shells.

• The atomic structure of an atom consists of a nucleus containing protons and neutrons, surrounded by electrons in energy levels or shells.

What are the three main subatomic particles and their charges?

• Protons, neutrons, and electrons

• Protons, neutrons, and positrons

• Neutrons, electrons, and photons

• Protons, electrons, and positrons

What is the atomic number of an element?

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

• The atomic number of an element is the number of protons and neutrons in the nucleus of an atom.

• The atomic number of an element is the number of electrons in the nucleus of an atom.

• The atomic number of an element is the number of neutrons in the nucleus of an atom.

What is the mass number of an atom?

• Total number of protons and neutrons

• Total number of neutrons

• Total number of protons

• Total number of electrons

What is an isotope?

• A variant of an element with the same number of protons but a different number of neutrons.

• A variant of an element with the same number of protons but a different number of electrons.

• A variant of an element with the same number of neutrons but a different number of protons.

• A variant of an element with the same number of electrons but a different number of protons.

What are valence electrons?

• Electrons in the nucleus of an atom.

• Electrons in the outermost energy level of an atom.

• Electrons in the innermost energy level of an atom.

• Electrons in the middle energy level of an atom.

What is ionization energy?

• The amount of energy required to remove an electron from an atom or ion in its ground state.

• The amount of energy released when an electron is added to an atom or ion in its ground state.

• The amount of energy required to move an electron from one energy level to another within an atom or ion.

• The amount of energy required to add an electron to an atom or ion in its ground state.

What is electronegativity?

• Electronegativity is a measure of the size of an atom.

• Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons.

• Electronegativity is a measure of the number of electrons in an atom.

• Electronegativity is a measure of the stability of an atom.

What are the periodic trends for atomic radius?

• The atomic radius generally increases across a period from left to right and decreases down a group.

• The atomic radius generally decreases across a period from left to right and increases down a group.

• The atomic radius remains constant across a period from left to right and increases down a group.

• The atomic radius generally decreases across a period from right to left and increases up a group.

What are the periodic trends for ionization energy?

• Ionization energy increases across a period and decreases down a group.

• Ionization energy increases across a period and remains constant down a group.

• Ionization energy remains constant across a period and decreases down a group.

• Ionization energy decreases across a period and increases down a group.