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