Fall Semester Exam Review

Front

What contains most of the mass of an atom?

Back

Nucleus

Front

What is the formula with the lowest whole number ratio of elements in a compound called?

Back

Empirical Formula

Front

Which elements in the periodic table are least likely to combine with other elements?

Back

Noble gases

Front

A wave with a large wavelength will have a ______ frequency and _____ energy.

Back

Low frequency and low energy.

Front

What two types of atoms make a covalent bond?

Back

2 Nonmetals

Front

What is the definition of an atom?

Back

The smallest unit of matter that retains the properties of an element.

Front

What is the difference between a molecular formula and an empirical formula?

Back

A molecular formula shows the actual number of atoms of each element in a molecule, while an empirical formula shows the simplest whole number ratio of the elements.

Front

What are noble gases?

Back

Elements in Group 18 of the periodic table that are mostly unreactive due to having a full valence shell.

Front

What is a covalent bond?

Back

A chemical bond formed when two nonmetals share electrons.

Front

What is the significance of the electron cloud in an atom?

Back

It represents the region around the nucleus where electrons are likely to be found.