There are three stable forms of neon: neon-20, neon-21, and neon-22. Which statement is true?(1 point)
Responses
Their number of protons differ.
Their number of protons differ.
The number of neutrons are the same.
The number of neutrons are the same.
Their atomic masses differ.
Their atomic masses differ.
They are radioactive, like all isotopes.
Their atomic masses differ.
Beryllium has an atomic number of 4. How many neutrons does the isotope beryllium-9 have?(1 point)
Responses
13
13
5
5
4
4
9
5
Where do you find the atoms with the largest atomic radius on the periodic table?(1 point)
Responses
the upper right
the upper right
the upper left
the upper left
the lower right
the lower right
the bottom left corner
the bottom left corner
Which has a higher ionization energy: chlorine (Cl) or magnesium (Mg)? Why? Select the best answer.(1 point)
Responses
Mg; it takes more energy to pull two electrons away from magnesium(Mg) than it does to take them from chlorine(Cl).
Mg; it takes more energy to pull two electrons away from magnesium(Mg) than it does to take them from chlorine(Cl).
Cl; it takes less energy to add an electron to a valence shell that is nearly full.
Cl; it takes less energy to add an electron to a valence shell that is nearly full.
Cl; it takes much more energy to pull an electron away from a valence shell that is nearly full.
Cl; it takes much more energy to pull an electron away from a valence shell that is nearly full.
Mg; magnesium has more valence electrons than chlorine.
Cl; it takes less energy to add an electron to a valence shell that is nearly full.
How does the Coulomb force affect charge interactions?(1 point)
Responses
Like charges repel, and opposite charges attract.
Like charges repel, and opposite charges attract.
Like and opposite charges repel.
Like and opposite charges repel.
Like charges attract, and opposite charges repel.
Like charges attract, and opposite charges repel.
Like and opposite charges attract.