Chemistry Unit Test

An atom is

• Made of protons, electrons, and neutrons
• Is the basic building block of all matter
• The smallest part of an element that can be identified as that element
• All of these

He is given credit for the first periodic table of the elements.

• Henry Mosely
• Dimitri Mendeleev
• Albert Einstein

Horizontal rows on the periodic table are called _______________

• Groups/Families
• Periods
• Energy Levels

Vertical columns on the periodic table are called

• Groups/Families
• Periods
• Oxidations Numbers

What element is located at period 4, group 17

• Fluorine
• Beryllium
• Bromine

What is the atomic number of the element seen at period 4, group 17?

• 9
• 35
• 79.04

What is its atomic mass of the element seen at period 4, group 17?

• 19.08
• 35
• 79.904

What is the mass number of the most common isotope seen at period 4, group 17?

• 80
• 79
• 19

How many protons are in the atom seen at period 4, group 17?

• 35
• 9
• 79

How many electrons in the neutral atom seen at period 4, group 17?

• 19
• 79
• 35