Atomic Number and Atomic Mass

What element is this?

• Helium

• Oxygen

• Carbon

• Nitrogen

Answer explanation

Carbon has 6 PROTONS. The number of protons CAN NEVER CHANGE. IF IT BECOMES 5 PROTONS IT IS NOT CARBON. IF IT IS 6 PROTONS IT IS NOT CARBON. CARBON IS 6 PROTONS.

Tags

NGSS.MS-PS1-1

Carbon has 6 Protons. What is its TOTAL WEIGHT? In science, weight is called MASS. Look at the square from the periodic table on the picture to find the MASS.

• 6 Atomic Mass Units (AMU)

• 12.68

• 12.01

• 18.01

Answer explanation

THE TOTAL WEIGHT (MASS) IS 12.01. THERE ARE 6 PROTONS. EACH PROTON WEIGHS 1.

What is missing in the Nucleus shown? Inside the nucleus are two types of particles: Protons and _________.

• Mecatrons.

• Cartrons.

• Scantrons.

• Neutrons.

Answer explanation

THE CARBON NUCLEUS HAS 6 PROTONS AND ALSO HAS NEUTRONS. THE TOTAL WEIGHT OF THE CARBON ATOM IS 12.01 AMU.

Tags

NGSS.MS-PS1-1

The Neutrons are missing in the green Circle. How many Neutrons are there in the Carbon Atom?

• 12.01

• 6

• 6.99

• 6.89

Answer explanation

6 PROTONS + 6 NEUTRONS = TOTAL WEIGHT OF THE CARBON ATOM (12.01)

(WE WIIL LEARN ABOUT THE .01 LATER)

Tags

NGSS.MS-PS1-1

HOW MANY PROTONS DOES OXYGEN HAVE?

• 15.99

• 16

• 8

• 6

Answer explanation

OXYGEN HAS 8 PROTONS (YOU CAN COUNT SQUARES TO OXYGEN IN THE 2ND ROW (PERIOD).

Tags

NGSS.MS-PS1-1

What does the Oxygen atom weight (MASS)?

• 8 protons

• 8 Scantrons

• 15.99 Atomic Mass Units (AMU)

• 8 AMU

Answer explanation

The Oxygen atom has a weight of 15.99 Atomic Mass Units.

Tags

NGSS.MS-PS1-1

How many Neutrons does oxygen have? Complete the following: 8 protons + ? Neutrons = Total Atomic Weight (15.99)

• 8 Protons

• 8 Scantrons

• 8 Neutrons

• 16 Atomic Mass Units.

Answer explanation

There are 8 Protons and 8 Neutrons . The Atomic Weight (Mass) = 15.99 (or 16)

Tags

NGSS.MS-PS1-1

What is wrong with this picture?

• The Atomic Number (the number of Neutrons) should be 5

• The Atomic Mass (the number of Protons and Neutrons ) should be 25

• The Atomic Number (the number of Protons) should be 3.

• The symbol for Lithium is LI

Answer explanation

The Atomic Number (the number of Protons) is 3.

Tags

NGSS.MS-PS1-1

What is wrong with this picture?

• 1. 12.01 is the Atomic Number for Carbon

• 7 is the Atomic Mass (weight) of Carbon

• Carbon's Atomic Number is 6. If it were 7, this element would be Nitrogen. An Atomic Number does not change.

• The Atomic Mass of Carbon is 12.01 +7 =19..01. The Atomic Mass is the sum of the Atomic Number and the Atomic Mass.

Tags

NGSS.MS-PS1-1

A Neutral Oxygen atom has 8 Protons, 8 Electrons and 8 Neutrons. What is its Atomic Mass?

• 8

• 16

• 24

• 32

Tags

NGSS.MS-PS1-1