Starter: Atomic Structure/Average Atomic Mass

Oxygen has 8 protons. What is oxygen's atomic number?

• 16
• 8
• 15.999
• 0

Tags

NGSS.MS-PS1-1

A neutral atom of Carbon-13 has ________ electrons and _________ neutrons

• 13, 13
• 6, 7
• 7, 7
• 6, 6

Tags

NGSS.MS-PS1-1

Isotopes are atoms of the same element that have the same number of __________ but different number of __________ . Therefore, isotopes of the same element have different masses. 

• protons, neutrons
• protons, electrons
• neutrons, protons
• electrons, protons

Tags

NGSS.HS-PS1-8

What is true about a neutral atom?

• The number of protons equal the number of neutrons
• The number of protons equal the number of electrons
• The number of neutrons equal the number of electrons
• The number of protons, neutrons, and electrons are all different

Tags

NGSS.MS-PS1-1

The nucleus is ____________ charged whereas the electron cloud is ____________ charged. 

• negatively, positively
• negatively, negatively
• positively, positively
• positively, negatively

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

The  mass of an atom is located  in the ___________ and the volume of an atom is made of the ____________

• electron cloud, nucleus
• electron cloud, energy levels
• nucleus, electron cloud
• nucleus, neutrons

Tags

NGSS.MS-PS1-1

Do the following atoms belong to the same element? Explain
       Aluminum-27
       An atom with 14 protons and 13 neutrons

• Yes because they have the same number of protons
• Yes because they have the same mass
• No because they have different number of protons
• No because they have different number of neutrons

Tags

NGSS.MS-PS1-1

An element has two naturally occurring isotopes. One is 10.013 amu and is 19.9% abundant. The other is 11.01 amu and is 80.1% abundant. What is the average atomic mass? What element is it?

• 9.012, Beryllium
• 12.011, Carbon
• 6.941, Lithium
• 10.812, Boron

Nitrogen has three occurring isotopes: Nitrogen-13, Nitrogen-14, Nitrogen-15. Which isotope is the most abundant?

• Nitrogen-13
• Nitrogen-14
• Nitrogen-15
• Based on the information given, it cannot be determined