Chemistry 8.5A-C

A neutral atom has 12 protons and an unspecified number of neutrons.  What is the identity of the element?

• Magnesium
• Vanadium
• Sodium
• Titanium

Calculate the atomic mass of the atom represented above.

• 11
• 12
• 23
• 34

What conclusion can you make about the elements shown above?

• Phosphorus has more valence electrons than nitrogen.
• Carbon has fewer protons in its nucleus than nitrogen.
• Phosphorus is more like silicon than it is like nitrogen.
• Aluminum is smaller than carbon.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What number indicates the nucleus?

• 1
• 2
• 3
• 4

Where is most of the mass in an atom located?

• in the nucleus
• in the protons
• in the neutrons
• in the electrons

Each element is unique and different from other elements because of its 

• atomic number
• number electrons
• mass number
• average atomic mass

What number indicates a proton?

• 1
• 2
• 3
• 4

The particles with no charge in an atom are the _______.

• electrons
• neutrons
• protons
• protons and neutrons

Tags

NGSS.MS-PS1-1

 What is the mass number of this element?

• 5
• 27
• 32
• 59

What is between the nucleus and the electrons in an atom?

• air
• nothing
• no one knows
• water vapor