Periods go left to right or horizontally. Groups are a name for the vertical columns in a periodic table. Each column is called a group. The elements in each group have the same number of electrons in the outer orbital.
Answer and Explanation:
9. Gas particles are always in constant and <u>C. Random</u> motion.
10. In a sample of a gas, most of the volume is <u>B. Empty Space</u>.
11. Which state of matter has constant shape and volume?
<u>A. Solid</u>
12. A solid is a state of matter that has a <u>B. Definite Volume and Definite Shape</u>.
13. In which state of matter are particles packed together in fixed positions?
<u>B. Solid</u>
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<em><u>#teamtrees #PAW (Plant And Water)</u></em>
Answer:
-A positively charged nucleus is surrounded by one
or more negatively charged electrons.