Which statement about an atom is correct?(1 point)
The proton has no charge and is found in the nucleus.
The neutron has a negative charge and is found in the nucleus.
The electron has a negative charge and is found outside of the nucleus.
The neutron has no charge and is found outside of the nucleus.
5 answers
The electron has a negative charge and is found outside of the nucleus.
Cobalt has a mass number of 59 and an atomic number of 27. A student wants to create a model of a cobalt atom. Which statement about the model is correct?(1 point)
Responses
The model should show 27 protons and 32 neutrons.
The model should show 27 protons and 32 neutrons.
The model should show 27 protons and 27 neutrons.
The model should show 27 protons and 27 neutrons.
The model should show 32 protons and 59 neutrons.
The model should show 32 protons and 59 neutrons.
The model should show 59 protons and 27 neutrons.
Responses
The model should show 27 protons and 32 neutrons.
The model should show 27 protons and 32 neutrons.
The model should show 27 protons and 27 neutrons.
The model should show 27 protons and 27 neutrons.
The model should show 32 protons and 59 neutrons.
The model should show 32 protons and 59 neutrons.
The model should show 59 protons and 27 neutrons.
The model should show 27 protons and 32 neutrons.
In a molecule of lithium sulfide, there are two atoms of lithium and one atom of sulfur. Which statement about lithium sulfide is correct?(1 point)
Responses
Both lithium and sulfur form positive ions.
Both lithium and sulfur form positive ions.
A molecular model of lithium sulfide would have two spheres.
A molecular model of lithium sulfide would have two spheres.
The atoms in lithium sulfide are held together by bonds.
The atoms in lithium sulfide are held together by bonds.
The chemical formula for lithium sulfide is LiS2.
Responses
Both lithium and sulfur form positive ions.
Both lithium and sulfur form positive ions.
A molecular model of lithium sulfide would have two spheres.
A molecular model of lithium sulfide would have two spheres.
The atoms in lithium sulfide are held together by bonds.
The atoms in lithium sulfide are held together by bonds.
The chemical formula for lithium sulfide is LiS2.
The atoms in lithium sulfide are held together by bonds.