Atom, Isotopes & The Periodic Table

What are isotopes?

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

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

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

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

Define average atomic mass.

• Sum of the masses of all the isotopes of an element.

• The mass of the most abundant isotope of an element.

• The mass of the least abundant isotope of an element.

• Weighted average of the masses of all the isotopes of an element

Which elements are in the same period on the periodic table?

• Mn & Sr

• Ni & Pd

• Ar & Ne

• S & P

What are groups on the periodic table?

• Columns

• Rows

• Periods

• Elements

What is the mass number of an atom?

• The atomic number of an atom.

• The number of protons in an atom.

• The number of neutrons in an atom.

• The number of neutrons and protons in an atom

What is the atomic number of an atom?

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

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

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

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

Name two elements from the halogens group.

• Fluorine and chlorine

• Bromine and iodine.

• Sodium and potassium.

• Oxygen and nitrogen.

Name two elements from the noble gases group.

• Lithium & Hydrogen

• Fluorine & Chlorine

• Silicon & Sodium

• helium, neon

What are the characteristics of metals?

• Metals have low electrical and thermal conductivity, brittleness, and a dull appearance.

• Metals have low electrical and thermal conductivity, flexibility, and a rough appearance.

• Metals have high electrical and thermal resistance, brittleness, and a shiny appearance.

• Metals have high electrical and thermal conductivity, malleability, ductility, and a shiny appearance.

What are the characteristics of nonmetals?

• Nonmetals have low melting and boiling points, are poor conductors of heat and electricity, and tend to gain electrons in chemical reactions.

• Nonmetals have low melting and boiling points, are good conductors of heat and electricity, and tend to lose electrons in chemical reactions.

• Nonmetals have high melting and boiling points, are good conductors of heat and electricity, and tend to gain electrons in chemical reactions.

• Nonmetals have high melting and boiling points, are good conductors of heat and electricity, and tend to lose electrons in chemical reactions.