Atoms and the Periodic Table

The atomic number of an atom is determined by the number of

• protons.

• electrons.

• neutrons.

• isotopes.

In the modern periodic table, elements are arranged

• according to atomic mass.

• according to atomic number.

• in alphabetical order.

• according to the number of neutrons in their nuclei.

Of the following, the group that contains elements that are the most reactive is the

• alkali metals.

• alkaline earth metals.

• carbon family.

• noble gases.

Unlike metals, many nonmetals are

• good conductors of heat and electricity.

• malleable and ductile.

• gases at room temperature.

• shiny.

Elements that are gases at room temperature are likely to be classified as which of the following?

• metals

• nonmetals

• metalloids

• unreactive

Which property of aluminum (Al) makes it a suitable metal for soft drink cans?

• It has good electrical conductivity.

• It can be hammered into a thin sheet (malleability).

• It can be drawn into long wires (ductility).

• It can reflect light (shininess).

An atom of fluorine (F) has 10 neutrons. What is the total number of other subatomic particles in this atom? (Hint, fluorine's atomic mass is 19.)

• 9 protons, 9 electrons

• 9 protons, 19 electrons

• 10 protons, 10 electrons

• 19 protons, 19 electrons

Tags

NGSS.MS-PS1-1

Which combination of elements represents part of a group, or family, of the periodic table?

• oxygen, fluorine, and neon

• sulfur, chlorine, and argon

• fluorine and chlorine

• oxygen and chlorine

The periodic table is organized into horizontal rows called

• periods.

• groups (or families).

• seats.

• They are not called anything.

The periodic table is organized into vertical columns called

• periods.

• groups (or families).

• seats.

• They are not called anything.