In the gaseous state, the _?_ form diatomic covalent molecules.

When magnesium and fluorine react, what type of bond is formed?

All elements that have more than 92 protons can be classified as _?_.

Which element is present in all organic compounds?

_?_ are different molecular structures of the same element.

_?_ have both metallic and nonmetallic properties.

Which of the following elements is the most chemically active?

Which group of elements in the periodic table contains the noble gases?

The tendency of an element to react is closely related to _?_.

Compared with Group 2 elements, Group 16 elements have _?_.

Atoms of the most reactive elements tend to have _?_.

A member of the boron family has three valence electrons, while a member of the nitrogen family has _?_.

As you move from left to right across a period, the number of valence electrons _?_.

Which element is found in most of the compounds in your body except for water?

Which of the following Group 17 elements is the most reactive?

Which halogen is most likely to react?

Fertilizers usually contain two elements from Group 15, which are ____ and phosphorus.

Hydrogen does not have the typical properties of a metal. However, hydrogen is located above Group ____ because it has one valence electron.

The two most reactive groups of elements in the periodic table are the ___ and ____.

Element 5, Boron, has ____ valence electrons.

Which statement is NOT true about the elements fluorine, chlorine, and iodine?

Which statement is true about the metalloid silicon?

From ____ to _____ across a period in the periodic table, elements become less like a nonmetal and more like a metal in their properties.

Which one of these elements is always found in nature combined with other elements?

How many electrons do atoms of the alkali metals have in their outer energy levels?

Substances that can be hammered or rolled into sheets are _?_. Substances that can be drawn into wires without breaking are _?_.

Which of the following groups contains the most reactive metals?

The most reactive metal of them all is _?_.

Elements in groups 3 through 12 on the periodic table are known as the _?_ elements.

Why is hydrogen, which is a nonmetal, placed in the same group as the alkali metals?

Which of the following statements are true about the elements larger than uranium? Select all that apply.

Elements in group 2 of the periodic table are the _?_.

Which of these groups are the most common magnetic elements?