Any one who answer these questions gets 20 pts.
which is the largest category of elements on t...
Any one who answer these questions gets 20 pts.
which is the largest category of elements on the periodic table?
a. metals
b. metalloids
c. nonmetals
d. noble gases
what do the atoms of elements in the same period have in common?
a. they have the same number of protons.
b. they have the same number of neutrons.
c. they have the same number of electron shells.
d. they have the same number of electrons in their outermost shells.
approximately how many elements are there that combine chemically in a great number of ways to produce compounds?
a. 25
b. 50
c. 75
d. 100
what are the rows of the periodic table of the elements also called?
a. groups
b. periods
c. families
d. columns
Answers: 2
Chemistry, 22.06.2019 06:00, kylieweeks052704
Which of the following did jj thompson discover about atoms? a)an atom has an internal structure. b) atoms are tiny indivisible particles. c)electrons orbit the nucleus of an atom. d) the nucleus of an atom contains protons and neutrons.
Answers: 2
Chemistry, 22.06.2019 10:40, yfgkeyonna
Ammonia and oxygen react to form nitrogen monoxide and water, like this: 4nh3 (g) + 5o2 (g) → 4no (g) + 6h2o (g) also, a chemist finds that at a certain temperature the equilibrium mixture of ammonia, oxygen, nitrogen monoxide, and water has the following composition: compound pressure at equilibrium nh3 65.1atm o2 31.3atm no 62.7atm h2o 65.8atm compound pressure at equilibrium nh3 65.3 atm o2 7.79 atm no 12.1 atm h2o 65.8 atm calculate the value of the equilibrium constant kp for this reaction. round your answer to 2 significant
Answers: 2
Chemistry, 22.06.2019 13:00, nadiarose6345
In a copper wire, a temperature increase is the result of which of the following
Answers: 1
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