Atomic Stability & Ionic Bonds Test Review II

When atoms form bonds and fill their outermost energy levels, they have an electronic arrangement similar to that of a(n)______________.

• noble gas

• hydrogen atom

• halogen

• sodium ion

Each molecule of table sugar, C₁₂H₂₂O₁₁, contains

• 0 atoms of carbon.

• 12 atoms of carbon.

• 6 atoms of carbon.

• 1 atom of carbon.

Tags

NGSS.MS-PS1-1

Which elements are least likely to form a compound with other atoms?

• noble gases

• halogens

• alkali metals

• transition metals

Often atoms join so that each atom will have

• an equal number of protons and electrons.

• more electrons than either protons or neutrons.

• an even number of electrons.

• an outermost energy level that is full of electrons.

Tags

NGSS.MS-PS1-1

Which of the following is an atom that has gained an electron?

• nonpolar molecule

• cation

• polar molecule

• anion

Solid ionic compounds

• are liquids and gases at room temperature.

• can be made from two elements with negative oxidation numbers.

• have very high melting points.

• are made only of elements that are on the right side of the periodic table.

Tags

NGSS.MS-PS1-4

The sum of the oxidation numbers in a neutral compound is always ____.

• a negative number

• one

• a positive number

• zero

The elements that make up a compound and the exact number of atoms of each element in a unit of the compound can be shown in a ____.

• chemical formula

• chemical symbol

• subscript

• superscript

Tags

NGSS.MS-PS1-1

The oxidation number of an atom is shown with a ____.

• negative number

• positive number

• subscript

• superscript

What is the total number of atoms in the compound Ca(ClO₃)₂?

• 2

• 3

• 5

• 9