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Elements And Compounds - Part 2
Test Description: CBA 2 review - TEKS 6.5A, 6.5B, and 6.5C
Instructions: Answer all questions to get your test result.
1) Elements are represented by chemical symbols. How many letters are in the chemical symbols of elements?
A
as many as you want
B
always two
C
only one
D
sometimes one, sometimes two
2) Is NaCl an element or a compound?
A
neither
B
element
C
both
D
compound
3) What type of substance is Au (gold)
A
compound
B
element
C
neither
D
both
4) One difference between elements and compounds is that there are an infinite number of elements, but only a limited number of compounds.
A
False
B
True
5) Which element makes up most of the Earth's atmosphere?
A
hydrogen
B
nitrogen
C
oxygen
D
carbon
6) The Earth's crust is primarily made up of which two elements?
A
nitrogen and hydrogen
B
oxygen and carbon
C
hydrogen and silicon
D
silicon and oxygen
7) What is a substance that can't be broken down into simpler substances?
A
compound
B
element
C
solution
D
mixture
8) Which of these phrases would you use to describe a substance but NOT a mixture
A
form of matter
B
none of the above
C
pure, uniform throughout
D
blend of compounds
9) All of the following are characteristic of neon. Which characteristic makes it an element?
A
a compound of two or more atoms that have been chemically combined.
B
colorless gas
C
relatively rare on Earth
D
made of one type of atom
10) Nitrogen is a major component of living things on Earth
A
False
B
True
11) One difference between elements and compounds is that an element consists of only one type of matter, while a compound consists of two or more types.
A
False
B
True
12) Which two elements make up the majority of all oceans on Earth?
A
oxygen and nitrogen
B
oxygen and hydrogen
C
hydrogen and carbon
D
nitrogen and carbon
13) Which one of these elements is NOT one of the three most abundant elements in plants and animals?
A
hydrogen
B
iron
C
carbon
D
oxygen
14) One difference between elements and compounds is that an element consists of only one type of matter, while a compound consists of two or more types.
A
False
B
True
15) Elements are made up of a uniform composition
A
false
B
true
16) A compound can never be a uniform composition
A
true
B
false
17) Which two elements primarily make up the Earth's atmosphere?
A
nitrogen and helium
B
nitrogen and hydrogen
C
silicon and helium
D
oxygen and nitrogen
18) Which list contains elements that make up most living things on Earth?
A
oxygen, sulfur, and carbon
B
sulfur, helium, and nitrogen
C
carbon, hydrogen, and oxygen
D
hydrogen, oxygen and silicon
*select an answer for all questions
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