Atoms And Elements Question Preview (ID: 13139)
Students Review Atoms And Elements.
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Which of these determines the identity of an element?
a) number of electrons
b) number of protons
c) number of energy levels
d) number of neutrons
Sodium contains 11 protons and 12 neutrons. How many electrons are in a neutral atom of sodium?
a) 23
b) 12
c) 11
d) 1
Elements are described as pure substances because
a) they are all found in nature
b) they can not be separated into parts by physical means
c) they have no charge
d) they can be produced in a laboratory
The nucleus of an atom contains
a) only neutrons
b) protons and electrons
c) protons and neutrons
d) only electrons
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) K, 39.098
c) potassium, 19
d) potassium, 39.098
How many electrons would a neutral atom of potassium have?
a) 19
b) 39
c) 58
d) 20
How are the elements in the modern periodic table arranged?
a) in alphabetical order
b) noble gases
c) by date of discovery
d) by number of protons
What elements in the periodic table are least likely to combine with other elements?
a) halogens
b) noble gases
c) alkaline earths
d) transition metals
Which of these statements is false?
a) The least reactive elements are in the far right column
b) Elements at the bottom of a column have more protons than elements at the top of a column
c) The elements on the left side of a row have higher atomic mass than the elements on the right side
d) Elements along the steplike line have properties of both metals and nonmetals
Carbon and oxygen combine chemically to form carbon dioxide. Carbon dioxide is
a) an ion
b) a nucleus
c) a compound
d) an atom
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