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

they form alkaline solutions when mixed with water

Which of the following is a true statement?

periods form horizontal rows; groups form vertical columns

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

it refers to substances that do not react with anything

What is true of all atoms?

they contain at least one proton

What do the elements highlighted in red have in common?

the same number of electron shells

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Answers

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

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