Matter Ch 2: Atoms and Elements
1. What is the smallest unit of an element that has all the properties of that element?
A: atom
2. What is the tiny center of the atom?
A: the nucleus
3. What is the subatomic particle inside the nucleus that has a positive charge?
A: proton
4. What is the subatomic particle outside the nucleus that has a negative charge?
A: electron
5. Two or more atoms linked together are called a ________.
A: molecule
6. Elements are classified by __________________.
A: their properties
7. When a metal can be hammered into a thin sheet, it is ___________.
A: malleable
8. What term means a metal can be formed into wires?
A: ductile
9. Some materials, like plastic, glass and rubber, conduct hardly any electricity, and they are
called __________.
A: insulators
10. Metals that aren’t pure, but mixtures of metals or metals and other elements are
___________________.
A: alloys
11. In the periodic table, elements are arranged in order of _________________.
A: atomic number
12. The elements are arranged into columns (or groups) based on similar properties, and they often
have the same number of ___________
A: electrons
13. ____________have properties of metals and nonmetals.
A: metalloids
14. Every element has an abbreviation called a ____________________.
A: chemical symbol
15. A __________________ is a substance made up of 2 or more elements.
A: compound
16. What is the chemical formula for glucose, a simple sugar?
A: C6H12O6
17. What is the chemical formula for table salt?
A: NaCl