Physical science CHECK my answers

1. What is the smallest part of all matter called? (1 point) *
a. Element
b. Atom***
c. Molecule
d. Compound
2. Which of the subatomic particles is negative? (1 point)
a. Nucleus
b. Neutron
c. Proton
d. Electron*****
3. Who provided the first evidence that atoms contain subatomic particles? (2 points) *
a. Thomson****
b. Rutherford
c. Dalton
d. Newton
4. When two fluorine atoms share a pair of electrons, the bond that forms is a(n) _____________. (2 points) *
a. Double bond
b. Polar covalent bond
c. Nonpolar covalent bond***
d. Ionic bond
5. How would you find the number of neutrons in an atom? (2 points) *
a. Atomic number - mass number****
b. Mass number - atomic number
c. Electrons + protons
d. Protons - electrons
6. Isotopes of an element have the same atomic number, but different mass numbers because they have different numbers of ________________. (2 points) *
a. Electrons
b. Protons
c. Neutrons***
d. Subatomic particles
7. 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
8. 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
9. 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
10. 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
11. 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.
12. 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

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  1. 5 is not right. The others look OK to me.

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  2. oof

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