Asked by glitchtrap

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

alkali metals and halogens
alkali metals and halogens

alkaline earth metals and halogens
Answered by glitchtrap
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 have the same number of valence electrons.
They have the same number of valence electrons.

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 are both inert.
Answered by glitchtrap
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 soft.
They are usually very soft.

They are usually very reactive.
They are usually very reactive.

They usually have high melting points.
Answered by glitchtrap
Neon and argon are both in Group 18 of the periodic table. Which property do they most likely share?(1 point)
Responses

metallic texture
metallic texture

low or no reactivity
low or no reactivity

strong odor
strong odor

silver color
Answered by glitchtrap
Question
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

1 - alkali metals
1 - alkali metals

18 - noble gases
18 - noble gases

2 - alkaline earth metals
2 - alkaline earth metals

17 - halogens
Answered by glitchtrap
Which observation most likely indicates that only a chemical change has taken place?(1 point)
Responses

States of matter changes.
States of matter changes.

The change cannot be reversed.
The change cannot be reversed.

The shape changes.
The shape changes.

A reaction occurs.
Answered by glitchtrap
Why is it a physical change to freeze water?(1 point)
Responses

The new and original substances are different.
The new and original substances are different.

Heat is released during the process.
Heat is released during the process.

Only a phase change occurs.
Only a phase change occurs.

A temperature change occurs.
Answered by glitchtrap
Which option is an example of a chemical change?(1 point)
Responses

burning wood
burning wood

stretching a rubber band
stretching a rubber band

chopping vegetables
Answered by GPT 3.5
alkali metals and halogens
Answered by GPT 3.5
They have the same number of valence electrons.
Answered by GPT 3.5
They usually have high melting points.
Answered by GPT 3.5
low or no reactivity
Answered by GPT 3.5
17 - halogens
Answered by GPT 3.5
A reaction occurs.
Answered by GPT 3.5
Only a phase change occurs.
Answered by GPT 3.5
burning wood