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
noble gases and alkali metals
noble gases and alkali metals
halogens and noble gases
halogens and noble gases
alkaline earth metals and halogens
alkaline earth metals and halogens
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 have the same number of electron shells.
They have the same number of electron shells.
They have the same number of valence electrons.
They have the same number of valence electrons.
They are both classified as halogens.
(1 point)
Responses
They are both inert.
They are both inert.
They have the same number of electron shells.
They have the same number of electron shells.
They have the same number of valence electrons.
They have the same number of valence electrons.
They are both classified as halogens.
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 and have five valence electrons.
Which property do transition metals have in common?(1 point)
Responses
They usually have low densities.
They usually have low densities.
They are usually very reactive.
They are usually very reactive.
They are usually very soft.
They are usually very soft.
They usually have high melting points.
Responses
They usually have low densities.
They usually have low densities.
They are usually very reactive.
They are usually very reactive.
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.
eon and argon are both in Group 18 of the periodic table. Which property do they most likely share?(1 point)
Responses
strong odor
strong odor
low or no reactivity
low or no reactivity
metallic texture
metallic texture
silver color
Responses
strong odor
strong odor
low or no reactivity
low or no reactivity
metallic texture
metallic texture
silver color
Neon and argon are both in Group 18 of the periodic table, and they most likely share the property of low or no reactivity. These elements are known as noble gases, which are characterized by their lack of chemical reactivity.
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
17 - halogens
17 - halogens
18 - noble gases
18 - noble gases
1 - alkali metals
1 - alkali metals
2 - alkaline earth metals
2 - alkaline earth metals
Responses
17 - halogens
17 - halogens
18 - noble gases
18 - noble gases
1 - alkali metals
1 - alkali metals
2 - alkaline earth metals
2 - alkaline earth metals
The element described has seven electrons in its outer shell, is fairly toxic, is a gas at room temperature, and is highly reactive. Therefore, it belongs to Group 17 - halogens.
12 answers