Which two groups of elements in the periodic table are the most reactive?(1 point)
Responses
alkali metals and halogens
alkali metals and halogens
noble gases and alkali metals
noble gases and alkali metals
alkaline earth metals and halogens
alkaline earth metals and halogens
halogens and noble gases
9 answers
alkali metals and halogens
Use the periodic table to answer the question.
An illustration shows the periodic table.
Which statement about nitrogen (N) and phosphorus (P) is correct?
(1 point)
Responses
They are both classified as halogens.
They are both classified as halogens.
They have the same number of valence electrons.
They have the same number of valence electrons.
They are both inert.
They are both inert.
They have the same number of electron shells.
They have the same number of electron shells.
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An illustration shows the periodic table.
Which statement about nitrogen (N) and phosphorus (P) is correct?
(1 point)
Responses
They are both classified as halogens.
They are both classified as halogens.
They have the same number of valence electrons.
They have the same number of valence electrons.
They are both inert.
They are both inert.
They have the same number of electron shells.
They have the same number of electron shells.
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They have the same number of valence electrons.
Which property do transition metals have in common?(1 point)
Responses
They are usually very soft.
They are usually very soft.
They usually have high melting points.
They usually have high melting points.
They usually have low densities.
They usually have low densities.
They are usually very reactive.
Responses
They are usually very soft.
They are usually very soft.
They usually have high melting points.
They usually have high melting points.
They usually have low densities.
They usually have low densities.
They are usually very reactive.
They usually have high melting points.
Neon 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
silver color
silver color
metallic texture
metallic texture
low or no reactivity
low or no reactivity
Responses
strong odor
strong odor
silver color
silver color
metallic texture
metallic texture
low or no reactivity
low or no reactivity
low or no 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
Responses
17 - halogens
17 - halogens
18 - noble gases
18 - noble gases
1 - alkali metals
1 - alkali metals
2 - alkaline earth metals
17 - halogens
1 answer