The Nucleus PS511 And The Electron Cloud PS512 Question Preview (ID: 10647)


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Does the nucleus of an atom have a positive or negative charge?
a) The nucleus contains protons, so it has a positive charge..
b) The nucleus contains protons, so it have a negative charge.
c) The nucleus contains the neutrons, so it has a neutral charge.
d) The nucleus contains electrons, so it has a negative charge.

Which count of subatomic particles gives an atom its unique identity as an element, and represents its atomic number?
a) The number of protons
b) The number of neutrons
c) The number of electrons
d) The number of neutrons plus the number of protons

Choose the true statement concerning the mass of subatomic particles.
a) Electrons are more massive than protons.
b) Electrons are more massive than neutrons.
c) Protons and neutrons have about the same mass
d) All subatomic particles have about the same mass

Which subatomic particle (or particles) exist in an atom's nucleus?
a) Protons only
b) Neutrons only
c) Protons and neutrons only
d) Protons, neutrons, and electrons

Which subatomic particle adds atomic mass to an atom but without adding charge?
a) ion
b) proton
c) electron
d) neutron

What is the maximum number of electrons in the first electron shell, closest to the nucleus?
a) 1
b) 2
c) 4
d) 8

Which subatomic particle is responsible for chemical properties of atoms?
a) protons
b) neutrons
c) electrons
d) neutrons and protons

A neutral charge by an atom is caused by which of the following conditions?
a) presence of neutrons in the nucleus
b) balance in number of protons and neutrons
c) balance in number of electrons and protons
d) the balance of electrons in each electron shell

Neon has 10 protons and 10 electrons. How many additional electrons would it take to fill the outer (second) electron shell?
a) 0
b) 1
c) 2
d) 6

Calcium has 20 electrons. How many electrons are in the outer shell?
a) 0
b) 2
c) 6
d) 8

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