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This set of MCQs helps you brush up on important chemistry topics and prepare you to dive into skill practice.
How many Hydrogen are in 4H2O?
4
8
2
16
How many atoms are there total in:
3
6
7
5
What does a sodium atom become when it loses its only valence electron?
Sodium ion
Sodium compound
Sodium atom
Ionic compound
What is the charge of an aluminum ion that has 13 protons and 10 electrons?
3+
+1
+2
0
What property do metals have that allows them to be hit or shaped without breaking?
Conductivity
Malleability
Density
Mobility
Element N has four isotopes. N-19, N-20, N-21, and N-22. Out of 100 atoms of the element N, 20 are N-19. 9 are N-20 52 are N-21 19 are N-22 Calculate the relative atomic mass of N.
7
198
203
207
What molecule is this?
CO2
C2O
C2O2
CO
Vanadium is more reactive than Strontium.
True
False
