The ____ is one kind of particle that makes up the atom and carries a positive charge.
Electron
Proton
Neutron
Plasma
Compared to protons, electrons have:
Much smaller mass and opposite charge
About the same mass and opposite charge
Much larger mass and the same charge
Much larger mass and opposite charge
What is the net charge of an atom with the same number of protons and electrons?
Equal to the number of protons multiplied by the charge on one proton
Equal to the number of electrons multiplied by the charge on one electron
Equal to the number of protons plus the number of neutrons
Zero
A common isotope of iron has a mass number of 56. How many protons and neutrons does this atom have in its nucleus?
26
56
30
4
Atoms with the same number of protons but different numbers of neutrons are called:
Prototypes
Isomers
Isotopes
Ions
Looking at your periodic table, the atomic number represents the:
Number of electrons plus the number of protons
Number of neutrons plus the number of protons
Number of protons in the nucleus
The average number of neutrons and protons for all naturally-occurring isotopes
In order for an atom to be considered stable, what is the general rule that must be followed (this rule does have exceptions, but works for most atoms)?
The number of electrons should equal the number of protons
The number of neutrons should equal the number of protons
The number of electrons should equal the column number
The number of protons should equal the number of electrons
Protons and neutrons are found grouped together in the:
Electron cloud
Charge
Nucleus
Periodic table
Electrons that are in the outer-most shell of the atom are considered to be in the:
Photon barrier
Quantum dynamo
Valence shell
Do any of the atom diagrams below represent atoms of the same element?
Which of the following is a TRUE statement about neutral atoms?
All neutral atoms of the same element have the same number of electrons, protons, and neutrons
Neutral atoms of different elements may have the same number of protons in the nucleus
All neutral atoms of the same element have the same number of electrons and protons but many have a different number of neutrons
The number of neutrons is equal to the number of protons
The periodic table notation for carbon-13 is shown below
_______ C 6 Carbon _______
Referring to this figure, how many protons, electrons, and neutrons does carbon-13 have?
6, 7, 13
6, 6, 7
7, 6, 13
7, 7, 13
The periodic table notation for silicon (Is) is shown below
_______ Si 14 Silicon ________
A neutral atom of silicon has how many electrons?
14
7
28
Cannot be determined with the information given
The noble gases such as helium and xenon do not form chemical bonds with other elements because they:
Have completely filled valence shells
Are chemically unstable
Are usually large atoms
Have been around the longest on Earth
Phosphorus has an average atomic mass of 30.974 amu. What isotope of Phosphorus are you most likely to find should you take a random sampling of Phosphorus from the Earth?
Phosphorus-30
Phosphorus-31
Phosphorus-32
Cannot be determined with the given information
The diagram shows a spectrum. The different colored bright lines represent:
Which of the following is evidence that electrons in atoms cannot have any amount of energy they would like but instead are only allowed to have certain specific amounts of energy?
The atomic mass is the sum of the number of protons and neutrons
Only specific colors of light are given off by atoms
All atoms of the same element have the same chemical properties
Radioactive elements are unstable
An ion of iodine-127 has a charge of +5. How many electrons does it have?
127
132
58
48
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