Chemistry Semester 1 Review

Front

How do metals obey the octet rule when bonding?

Back

Metals obey the octet rule by losing electrons.

Front

The periodic table is arranged in order of increasing ______

Back

The periodic table is arranged in order of increasing atomic numbers.

Front

Emission of light from an atom occurs when ____

Back

Emission of light occurs when electrons fall to lower energy levels.

Front

Which of the following equals one atomic mass unit (AMU)?

Back

One atomic mass unit (AMU) equals 1/12th the mass of a carbon-12 atom.

Front

A majority of the elements in the periodic table are____

Back

A majority of the elements in the periodic table are metals.

Front

What is the octet rule?

Back

The octet rule states that atoms tend to gain, lose, or share electrons to achieve a full outer shell of eight electrons.

Front

What are metalloids?

Back

Metalloids are elements that have properties of both metals and nonmetals.

Front

What is the significance of atomic numbers in the periodic table?

Back

Atomic numbers represent the number of protons in an atom's nucleus and determine the element's identity.

Front

What happens to electrons when they absorb energy?

Back

When electrons absorb energy, they jump to higher energy levels.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.