Have an account?
Skip to Content
Build your own quiz
10 questions
Show Answers
See Preview
- 1. Multiple Choice
About 25 of the 92 natural elements are known to be essential to life. Which four of these 25 elements make up approximately 96% of living matter?
carbon, sodium, chlorine, nitrogen
oxygen, hydrogen, calcium, sodium
carbon, hydrogen, nitrogen, oxygen
carbon, oxygen, sulfur, calcium
- 2. Multiple Choice
Each element is unique and different from other elements because of the number of protons in the nuclei of its atoms. Which of the following indicates the number of protons in an atom's nucleus?
atomic mass
atomic weight
atomic number
mass number
- 3. Multiple Choice
Oxygen has an atomic number of 8 and a mass number of 16. Thus, the atomic mass of an oxygen atom is
exactly 8 grams
exactly 8 daltons
approximately 16 grams
16 daltons
- 4. Multiple Choice
It might help to draw this out.
Choose all that are true about lithium bonding with chlorine.
lithium becomes a cation
one of lithium's electrons goes to chlorine
this is a covalent bond
chlorine gains a proton
- 5. Multiple Choice
Which statement is true?
An atom's atomic mass is the sum of its protons and neutrons.
An atom's atomic mass is the sum of its protons, neutrons, and electrons.
All atoms of an element have the same number of subatomic particles.
Ions of an element have significantly different masses than neutral atoms of an element.
- 6. Multiple Choice
What is FALSE about the elements in group 18?
Their valence energy levels are full.
They are inert.
They have eight electrons in their valence energy levels.
They are non-reactive.
- 7. Multiple Choice
The book talked about a molecule that has polar covalent bonds. What molecule was it talking about?
Water
Hydrongen Gas - H2
Oxygen Gas - O2
Sodium Chloride NaCl
- 8. Multiple Choice
What element is this?
Carbon
Oxygen
Beryllium
Seaborgium
- 9. Multiple Choice
When Magnesium bonds with Oxygen, what charge does Magnesium end up with?
+2
-2
It doesn't pick up a charge, it's a covalent bond.
-1
- 10. Multiple Choice
Which electrons determine the behavior of an atom?
Valence electrons
The ones in the inner-most energy level.
Positive electrons
Pfluberonic electrons
- Answer choicesTagsAnswer choicesTags