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Compounds
Test Description: Middle school compound review
Instructions: Answer all questions to get your test result.
1) Which of the following is the correct way to write a formula for Na1+, Cl 1-
A
NC
B
Na1Cl1
C
NaCl
D
ClNa
2) What is the oxidation number of potassium (K)?
A
1+
B
2+
C
2-
D
1-
3) What is the oxidation number of Oxygen (O)?
A
8
B
2-
C
16+
D
6+
4) How many valance electrons does Neon (Ne) have?
A
8
B
10
C
18
D
2
5) Why do atoms need 8 valance electrons?
A
To be chemically unstable
B
To be chemically stable
C
To be cool
D
To be noble
6) What two types of elements are needed for ionic compounds?
A
non-metal and non-metal
B
metal and metalloid
C
metal and non-metal
D
metal and metal
7) During an ionic compound the metal element -
A
gains electrons
B
loses proton
C
share electron
D
loses electrons
8) When the number of neutrons is different that what is predicted on the periodic table it is called -
A
ion
B
ionic
C
covalent
D
isotope
9) Carbon -14 (C-14) is an example of -
A
regular atom
B
Buddy biscuits
C
ion
D
isotope
10) Which element is likely to form an ionic bond with Oxygen (O)?
A
Hydrogen (H)
B
Carbon (C)
C
Iron (Fe)
D
Iodine (I)
*select an answer for all questions
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