WorksheetsSemester Final
Total questions: 20
Worksheet time: 14mins
Which of the following figures shows particles of a compound?
Group 16 of The Periodic Table has what charge?
+2
-1
-2
+4
The blue orbs represent nitrogen (N, element 7). The green orbs represent hydrogen (H, element 1). Write the chemical formula for this compound.
NH2
BH7
NH3
NH1
Can Ba (element 56) ionically bond with N (element 15)? Explain.
(a)
Why do covalent bonds form?
because they have similar compounds
because they are attracted to the same pair of neutrons
they want the same number of protons as the element next to them
when atoms stay together because they are attracted to the same pair of electrons
What Lewis Structure represents the element F2?
What is the max number of bonds nitrogen can have?
0
2
7
3
Which Lewis Structure for CO2 is incorrect?
Why was that structure from question 8 wrong?
(a)
How does a chemical equation describe chemical reactions?
(a)
What is a chemical reaction?
when atoms and chemical bonds stay the same
when 1 atom losses a chemical bond
a rearrangement of atoms and chemical bonds.
In a chemical reaction, what happens to atoms?
they stay the same
it goes down by 1
it goes up by 1
there are no atoms
Reactants is which one?
2H2 + O2
3McG
2 MgO
H2O
The product of KCIO4 + AI is?
4 AI2O3 + 3 KCI
AI2O3 + KCI
KCI + O2
AI2O3
According to the Conservation of Mass, what happens to the number and type of atoms after a chemical reaction?
atoms are the same but type is different
the types are the same but the atoms are different
they are the same
they are both different
Which picture shows a synthesis reaction?
Which picture shows a decomposition reaction?
Which picture shows a combustion reaction?
Which picture shows a single-replacement reaction?
Which picture shows a double-replacement reaction?
