Semester Exam Study Guide

What is the number of protons that the element in this image contain?

• 14
• 7
• 15
• 18

Tags

NGSS.MS-PS1-1

What is the atomic number?

• the number of protons
• the number of protons and neutrons
• the number of neutrons
• the number of protons and electrons

UP and DOWN columns on the periodic table are

• groups

• periods

SIDE TO SIDE rows on the periodic table are

• groups

• periods

Which elements have properties in common?

• elements in a group

• elements in a period

The group number tells you the number of

• protons

• valence electrons

• energy levels

The period number tells you the number of

• protons

• energy levels

• valence electrons

Which two elements have properties in common?

• Nitrogen and Phosphorous

• Oxygen and Nitrogen

• Sulfur and Nitrogen

How many Oxygen atoms (O) are in a  molecule  of CO₂

• 1
• 2
• 3
• 0

Tags

NGSS.MS-PS1-1

The small number to the right of an elemental symbol  ( H₂₎ is called?

•  a subscript 
• a coefficient 
• a variable 
• a divisor 

Tags

NGSS.MS-PS1-1