The two groups of elements in the periodic table that are the most reactive are alkali metals and halogens.
Which two groups of elements in the periodic table are the most reactive?(1 point)
Responses
alkaline earth metals and halogens
alkaline earth metals and halogens
halogens and noble gases
halogens and noble gases
noble gases and alkali metals
noble gases and alkali metals
alkali metals and halogens
9 answers
Which statement about nitrogen (N) and phosphorus (P) is correct?
(1 point)
Responses
They are both inert.
They are both inert.
They are both classified as halogens.
They are both classified as halogens.
They have the same number of electron shells.
They have the same number of electron shells.
They have the same number of valence electrons.
(1 point)
Responses
They are both inert.
They are both inert.
They are both classified as halogens.
They are both classified as halogens.
They have the same number of electron shells.
They have the same number of electron shells.
They have the same number of valence electrons.
The correct statement about nitrogen (N) and phosphorus (P) is:
They have the same number of valence electrons.
Both nitrogen and phosphorus are in Group 15 of the periodic table, so they each have five valence electrons.
Which property do transition metals have in common?(1 point)
Responses
They are usually very reactive.
They are usually very reactive.
They usually have low densities.
They usually have low densities.
They are usually very soft.
They are usually very soft.
They usually have high melting points.
Responses
They are usually very reactive.
They are usually very reactive.
They usually have low densities.
They usually have low densities.
They are usually very soft.
They are usually very soft.
They usually have high melting points.
The property that transition metals have in common is:
They usually have high melting points.
Transition metals are known for their high melting points compared to many other elements.
Neon and argon are both in Group 18 of the periodic table. Which property do they most likely share?(1 point)
Responses
silver color
silver color
strong odor
strong odor
low or no reactivity
low or no reactivity
metallic texture
Responses
silver color
silver color
strong odor
strong odor
low or no reactivity
low or no reactivity
metallic texture
Neon and argon are both in Group 18 of the periodic table, and they most likely share the property of:
low or no reactivity.
Both neon and argon are noble gases, known for their lack of reactivity due to having complete valence electron shells.
A scientist studies an element that has seven electrons in its outer shell, is fairly toxic, is a gas at room temperature, and is highly reactive. To which group of the periodic table does this element belong?(1 point)
Responses
18 - noble gases
18 - noble gases
17 - halogens
17 - halogens
2 - alkaline earth metals
2 - alkaline earth metals
1 - alkali metals
Responses
18 - noble gases
18 - noble gases
17 - halogens
17 - halogens
2 - alkaline earth metals
2 - alkaline earth metals
1 - alkali metals
The element described, which has seven electrons in its outer shell, is fairly toxic, is a gas at room temperature, and is highly reactive, belongs to:
17 - halogens.
The halogens are known for having seven valence electrons, being reactive, and including gaseous elements such as fluorine and chlorine.