What do the elements highlighted in red have in common?

the same number of electron shells

Which of the following is a true statement?

periods form horizontal rows; groups form vertical columns

What is true of all atoms?

they contain at least one proton

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

they form alkaline solutions when mixed with water

Noble gases are sometimes called "inert gases." What does "inert" mean in chemistry?

it refers to substances that do not react with anything

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BrainPOP: Periodic Table of the Elements

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periodic table chemistry

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Questions 10

Answers

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

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