Which of the following is a true statement?

Periods form horizontal rows; groups form vertical columns.

What do the elements highlighted in red have in common?

The same number of electron shells.

What is true of all atoms?

They contain at least one proton.

Noble gases are sometimes called "inert gases." What does the term "inert gases" mean?

It refers to substances that do not react with others.

What characteristics are shared by all alkali metals and alkaline earth metals?

They form alkaline solutions when mixed with water.

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Periodic Table 2

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The Periodic Table Discussion

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Answers

1
Which of the following is a true statement?
Periods form horizontal rows; groups form vertical columns.
Groups form horizontal rows; periods form vertical columns.
Gases form horizontal rows; classes form vertical columns.
Classes form horizontal rows; gases form vertical columns.
2
What do the orange and yellow spheres represent in this model of an atomic nucleus?
atoms and molecules
protons and neutrons
neutrons and electrons
neutrons and electrons
3
What do the elements highlighted in red have in common?
The same number of electron shells.
The same number of protons.
The same number of electrons.
The same number of neutrons.
4
What is one key physical difference between transition metals and poor metals?
reactivity
atomic mass
charge
hardness
5
What is true of all atoms?
They contain more than one electron shell.
They contain at least one proton.
They are electrically charged.
They have full outer electron shells.
6
You want to find a fermium sample, which has an atomic number of 100. Where would you look?
In outer space
In a science lab
Deep within the earth
In the earth's atmosphere
7
To become positively charged, an atom must:
Gain an electron
Gain a proton
Lose an electron
Lose an proton
8
Noble gases are sometimes called "inert gases." What does the term "inert gases" mean?
It refers to substances that have strong electric charges.
It refers to substances that do not react with others.
It refers to substances that easily lose electrons.
It refers to gases.
9
Carbon has an atomic number of 6. What can you conclude about carbon from this fact?
It is an isotope.
It has six protons.
It has six neutrons.
It has six electrons.
10
What characteristics are shared by all alkali metals and alkaline earth metals?
They do not react with water at all.
They conduct electricity very well.
They are strong and shiny.
They form alkaline solutions when mixed with water.

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