Elements And Compounds - Part 2 Question Preview (ID: 34362)
CBA 2 Review - TEKS 6.5A, 6.5B, And 6.5C.
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Elements are represented by chemical symbols. How many letters are in the chemical symbols of elements?
a) only one
b) always two
c) sometimes one, sometimes two
d) as many as you want
Is NaCl an element or a compound?
a) element
b) compound
c) neither
d) both
What type of substance is Au (gold)
a) element
b) compound
c) neither
d) both
One difference between elements and compounds is that there are an infinite number of elements, but only a limited number of compounds.
a) True
b) False
c)
d)
Which element makes up most of the Earth's atmosphere?
a) nitrogen
b) hydrogen
c) oxygen
d) carbon
The Earth's crust is primarily made up of which two elements?
a) nitrogen and hydrogen
b) oxygen and carbon
c) silicon and oxygen
d) hydrogen and silicon
What is a substance that can't be broken down into simpler substances?
a) compound
b) element
c) mixture
d) solution
Which of these phrases would you use to describe a substance but NOT a mixture
a) blend of compounds
b) pure, uniform throughout
c) form of matter
d) none of the above
All of the following are characteristic of neon. Which characteristic makes it an element?
a) colorless gas
b) relatively rare on Earth
c) made of one type of atom
d) a compound of two or more atoms that have been chemically combined.
Nitrogen is a major component of living things on Earth
a) True
b) False
c)
d)
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) True
b) False
c)
d)
Which two elements make up the majority of all oceans on Earth?
a) oxygen and hydrogen
b) hydrogen and carbon
c) oxygen and nitrogen
d) nitrogen and carbon
Which one of these elements is NOT one of the three most abundant elements in plants and animals?
a) hydrogen
b) oxygen
c) iron
d) carbon
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) True
b) False
c)
d)
Elements are made up of a uniform composition
a) true
b) false
c)
d)
A compound can never be a uniform composition
a) true
b) false
c)
d)
Which two elements primarily make up the Earth's atmosphere?
a) nitrogen and hydrogen
b) silicon and helium
c) oxygen and nitrogen
d) nitrogen and helium
Which list contains elements that make up most living things on Earth?
a) hydrogen, oxygen and silicon
b) oxygen, sulfur, and carbon
c) carbon, hydrogen, and oxygen
d) sulfur, helium, and nitrogen
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