5 Written Questions
5 Matching Questions
- The tendency of water molecules to stick to each other is called
- What is mass?
- What is a covalent bond?
- The number of covalent bonds an atom can form is equal to what?
- What are elements?
- a Forms when 2 atoms share 1 or more pairs of outer shell electrons and forms a molecule.
- b The number of additional electrons needed to fill its outer shell.
- c Substances that cannot be broken down into other substances.
- d cohesion
- e The sum of the number of protons and neutrons in its nucleus.
5 Multiple Choice Questions
- A subatomic particle w/ a single unit of positive electrical charge (+)
- Protons and neutrons.
- Atoms held together by covalent bonds.
- A subatomic particle w/ a negative charge.
- Oxygen, carbon, hydrogen, and nitrogen.
5 True/False Questions
What determines the chemical properties of an atom? → the atomic number.
What are the three types of chemical bonds? → Formed when a particularly positive atom from one polar molecule is attracted to the partially negative atoms in another molecule.
How many of the 90 naturally- occuring elements are used by living organisms? → Oxygen, carbon, hydrogen, and nitrogen.
The bond between the hydrogen atom of one water molecule and the oxygen atom of another water molecule is made possible by → the polarity of the water molecule
Which part of the atom has the most energy? → The outer shell.