Chapter 2.1 Quiz - 20 points
1.
What two subatomic particles make up the nucleus of an atom? What does that mean the charge of the nucleus is?
The nucleus is made of protons and neutrons. The charge of the nucleus is positive.
2.
What is an element? Give an example. An element is a pure substance. Ex)
Carbon, Oxygen, Hydrogen, etc.
3.
What is this an example of? Why? This is an isotope because it is one type of atom with a different mass.
4.
What is an ion? An atom with a positive or negative charge.
5.
What can radioactive isotopes be used for? Dating or following the movement of substances.
6.
Why is NaCl considered a compound?
It is a chemical combination of 2 or more elements.
7.
What is a compound? Use the words: properties, physical, elements, chemical, and different. A compound has different physical and chemical properties than the elements that make it up.
8.
What happens to the electrons in an ionic bond?
They are transferred.
9.
What is a covalent bond?
A bond that forms when electrons are shared.
10.
What type of force develops as a result of an attraction between oppositely charged regions of nearby molecules? Van der Waals forces