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Atoms And Elements
Test Description: Students Review atoms and elements
Instructions: Answer all questions to get your test result.
1) Which of these determines the identity of an element?
A
number of energy levels
B
number of electrons
C
number of protons
D
number of neutrons
2) Sodium contains 11 protons and 12 neutrons. How many electrons are in a neutral atom of sodium?
A
1
B
12
C
23
D
11
3) Elements are described as pure substances because
A
they can not be separated into parts by physical means
B
they have no charge
C
they can be produced in a laboratory
D
they are all found in nature
4) The nucleus of an atom contains
A
protons and neutrons
B
protons and electrons
C
only electrons
D
only neutrons
5) What is the name and atomic number of the element in the first row fourth square down on the periodic table?
A
K, 19
B
potassium, 19
C
K, 39.098
D
potassium, 39.098
6) How many electrons would a neutral atom of potassium have?
A
58
B
19
C
39
D
20
7) How are the elements in the modern periodic table arranged?
A
in alphabetical order
B
noble gases
C
by number of protons
D
by date of discovery
8) What elements in the periodic table are least likely to combine with other elements?
A
noble gases
B
alkaline earths
C
transition metals
D
halogens
9) Which of these statements is false?
A
Elements at the bottom of a column have more protons than elements at the top of a column
B
Elements along the steplike line have properties of both metals and nonmetals
C
The elements on the left side of a row have higher atomic mass than the elements on the right side
D
The least reactive elements are in the far right column
10) Carbon and oxygen combine chemically to form carbon dioxide. Carbon dioxide is
A
a nucleus
B
an atom
C
an ion
D
a compound
*select an answer for all questions
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