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Chemistry, 31.01.2021 14:00 Leslie8284
PLEASE HELP ILL GIVE U FULL 5 STAR N BRAINLIST ON TOP! answer the ones u know!!.
1. An atom contains 4 protons, 5 neutrons and 4 electrons. its mass number is?
A) 5
B) 9
C) 4
D) 13
2. A charged atom is called:
a) radioactive.
b) a proton.
c) an ion.
d) an isotope.
3. the mass number of an element is the total number of:
a) protons and electrons in an atom.
b) protons in an atom.
c) protons and neutrons in an atom.
d) electrons is an atom.
4. the charge of an atom is always:
a) greater than the charge of it's nucleus.
b) negative.
c) neutral.
d) positive.
5) which of the following is found in the nucleus of an atom?
a) silicon
b) proton
c) electron
d) ion
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Answers: 2
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1. An atom contain...
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