Atomic Basics Worksheet (Page 3 of 4) in pdf

Atomic Basics Worksheet Page 3

Atomic Basics

Answer Key

Part A: Atomic Structure

1. Draw five protons in the nucleus of the atom. Label them with their charge.

2. Draw six neutrons in the nucleus of the atom.

3. Draw two electrons in the first energy level and label them with their charge.

4. Draw three electrons in the second energy level and label them with their charge.

5. What element is represented by the diagram? BORON

Part B: Atomic Calculations

6. Label the information provided in the periodic table.

7. What does the atomic number represent?

ATOMIC NUMBER

PROTONS or ELECTRONS

SYMBOL

8. What does the atomic mass represent?

NAME

Oxygen

ATOMIC MASS

PROTONS + NEUTRONS

15.999

9. How would you figure the number of protons or electrons in an atom? USE THE ATOMIC NUMBER

10. How would you figure the number of neutrons in an atom? SUBTRACT THE ATOMIC NUMBER FROM

THE ATOMIC MASS

11. Use your knowledge of atomic calculations to complete the chart.

Element

Atomic

Protons

Neutrons

Electrons

Number

Mass

108

174

NOTE: The number protons and electrons is equal to the atomic number. To find neutrons, subtract the number of

protons from the atomic mass. To find the atomic mass, add the number of protons and neutrons.

T. Trimpe 2007

Atomic Basics Worksheet Page 3