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☆☆☆☆☆Cards in this guide (9)
Do neutrons have an electric charge
Neutrons have a neutral charge
Neutrons have no charge.
Atoms with a low ionization energy hold tight to their outer valence electrons
No; the phrase given characterizes high rather than low ionization.
How do solid change their shape
Solids change their shapes in many ways. Solids will melt if they are in hot temperatures, and this changes their shape.
Which of the following is the best example of an open system
an anthill
What does the law of conservation of matter show
That the total number of atoms in matter will never change
Answer2:
As I learned it:
Matter can neither be created nor destroyed, only changed in form.
This is/was Newtonian physics. Einstein showed that in nuclear events matter can be changed to energy. And, in general relativity even more complex change can occur.
Which of the following is an example of a phase change from liquid to solid
Water freezing into ice is an example of a phase change from liquid to solid.
What group of elements has seven valence electrons
The Halogens have seven valence electrons.
Which phase of matter is the least common on earth
Liquids
which of the following properties describes plasma
it can change shape and volume
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