The Elements (Grade 8)
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The basic building blocks of elements are called
- silica tetrahedra
Isotopes are atoms of the same element with the same number of protons and
- a different number of electrons
- a different number of molecules
- a different number of neutrons
- the same number of neutrons
All the following elements are metals except:
Copper is a chemical element with the atomic number of
This is a metallic element that reacts violently with water.
There are valence electrons in an atom of carbon.
Which element is a colorless gas of low mass that is rarely found uncombined?
Except for helium, this expresses the stability of a noble-gas atom's filled outer energy level:
- the duet rule
- the octet rule
- the sextet rule
- the trio rule
Which one of these elements are NOT part of the Noble gases family?
Which gas is monatomic at STP?
Which is an element?
If potassium is in Group 1A, how many electrons do you expect to see in its Lewis Dot structure?
Which element is an example of a rare earth element?
How many valence electrons does an atom of bromine have?