Physical science

1. electrons in the first energy level of an atom, (2 points) *
a. have no energy
b. have the lowest possible energy
c. have the highest possible energy
d. are unstable

2. an element that is shiny and easily conducts electric currents is called a (2 points) *
a. nonmetal
b. metal
c. transition metal
d. noble gas

3. elements that have the same number of valence electrons are in the same on the periodic table. (2 points) *
a. group
b. period
c. row
d. section

4. which list of elements contains only metalloids? (2 points) *
a. gallium, germanium, and arsenic
b. silicon and germanium
c. aluminum, silicon, and phosphorus
d. phosphorus and arsenic

5. in the rutherford experiment, why weren’t all the alpha particles deflected? (3 points) *
a. the particles have a positive charge.
b. the particles were too small.
c. the nucleus was too small compared to the atom as a whole.
d. the beam was attracted to a positively charged plate.

6. what does an electron cloud represent? (3 points)
a. the location of electrons around the nucleus
b. the location of electrons within the nucleus
c. the location of electrons in the universe
d. the location of the nucleus