Group 2 elements have two valence electrons. Which kind of bond will they most likely form, and why?(1 point)
Responses
An ionic bond is likely because they will want to give away two valence electrons in order to become stable.
An ionic bond is likely because they will want to give away two valence electrons in order to become stable.
An ionic bond is likely because they are metals and will want to bond with nonmetals.
An ionic bond is likely because they are metals and will want to bond with nonmetals.
A covalent bond is likely because they want to share those two valence electrons in order to become stable.
A covalent bond is likely because they want to share those two valence electrons in order to become stable.
A metallic bond is likely because they are metals and can bond with other metals.
A covalent bond is likely because they want to share those two valence electrons in order to become stable.
Why are the noble gases the least reactive elements? (1 point)
Responses
They have an empty inner electron shell.
They have an empty inner electron shell.
They are the elements with the smallest atomic mass.
They are the elements with the smallest atomic mass.
They have a full valence electron shell.
They have a full valence electron shell.
They are the most electronegative elements
They have a full valence electron shell.
Which statement correctly compares the valence electrons for atoms of francium (Fr) and barium (Ba)?
(1 point)
Responses
Francium has fewer valence electrons, but they are in a higher energy level.
Francium has fewer valence electrons, but they are in a higher energy level.
Francium has more valence electrons, and they are in a higher energy level.
Francium has more valence electrons, and they are in a higher energy level.
Barium has fewer valence electrons, but they are in a higher energy level.
Barium has fewer valence electrons, but they are in a higher energy level.
Barium has more valence electrons, and they are in a higher energy level.
Barium has fewer valence electrons, but they are in a higher energy level.
Which statement best explains why hydrogen’s atomic number is equal to its mass?(1 point)
Responses
Hydrogen does not have any neutrons.
Hydrogen does not have any neutrons.
Hydrogen is in the first row and the first column of the periodic table.
Hydrogen is in the first row and the first column of the periodic table.
Hydrogen only has one electron
Hydrogen only has one electron
Hydrogen is stable, with two electrons in its outer shell.
Hydrogen is stable, with two electrons in its outer shell.
Hydrogen only has one electron.
Which statement about metals and nonmetals is correct?(1 point)
Responses
Most metals are a solid under normal conditions, and most nonmetals are a liquid.
Most metals are a solid under normal conditions, and most nonmetals are a liquid.
Metals and nonmetals can both be found in any column of the periodic table.
Metals and nonmetals can both be found in any column of the periodic table.
Metals tend to be poor conductors of electricity, while nonmetals are strong conductors of electricity.
Metals tend to be poor conductors of electricity, while nonmetals are strong conductors of electricity.
Metals can be hammered into thin sheets, and nonmetals are brittle.
Metals can be hammered into thin sheets, and nonmetals are brittle.
Ammonia is a weak base. Potassium hydroxide is a strong base. Which statement is correct?(1 point)
Responses
A solution of potassium hydroxide will always have greater conductivity than a solution of ammonia.
A solution of potassium hydroxide will always have greater conductivity than a solution of ammonia.
A solution of potassium hydroxide will always have a higher pH than a solution of ammonia.
A solution of potassium hydroxide will always have a higher pH than a solution of ammonia.
A solution of potassium hydroxide will always have a lesser concentration of solute than a solution of ammonia.
A solution of potassium hydroxide will always have a lesser concentration of solute than a solution of ammonia.
A solution of potassium hydroxide will always have more OH– ions than a solution of ammonia.