Chemistry Midterm Review

The atomic number will tell you the...

• Amount of neutrons in an atom

• The identity of an element

• Whether it is ionic or covalent

• The mass number

The identity of an element is determined by its___.

• Covalent number

• Ionic Number

• Atomic Number

• Neutron Number

How many protons, electrons, and neutrons would Oxygen have? (know how to find protons, neutrons, and electrons)

• 8 protons, 8 neutrons, 8 electrons

• 9 protons, 8 neutrons, 7 electrons

• 8 protons, 16 neutrons, 8 electrons

• 16 protons, 8 neutrons, 16 electrons

If you have a molecule of Neon with an atomic number of 10 and a mass number of 19, how many neutrons would the molecule have? (Know how to identify neutrons, electrons, and protons)

• 10

• 9

• 8

• 7

An atom that has 60 protons and 80 neutrons would have a mass number of (know how to identify the mass number from the protons and neutrons)

• 60

• 80

• 140

• 20

Which is the electron configuration for an oxygen atom?

• 1s²2s²2p⁶3s²3p⁶4s²
• 1s²2s²2p⁴
• 1s²2s²2p⁶
• 1s²2s²2p⁶3s²3p⁶

Tags

NGSS.HS-PS1-1

What is this element? 
1s²2s²2p⁶3s²3p⁶
4s²3d¹⁰4p⁶

• Argon
• Krypton
• Selenium
• Bromide

Tags

NGSS.HS-PS1-1

Which of the following statements is false?

• The protons and electrons have opposite charges.

• Atoms gain or lose electrons when they form ions.

• The electron and neutron are found in the nucleus.

Which of the following are isotopes of Nitrogen?

• $^2He\ and\ ^3He$

• $^{17}N\ and\ ^{15}N$

• $^{16}O\ and\ ^{16}C$

Substance E has 39 protons, 38 electrons, and 35 neutrons. Substance F has 39 protons, 38 electrons, and 34 neutrons. Substance E and F can be categorized as…

• Different elements

• Ions

• Isotopes

• none of the above