my answer has the ****
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
Yes.
I might argue about #3 because Thompson's "plum pudding" model was pretty crude compared to Rutherford's model, but Thomson did have sub atomic particles.
To answer the questions:
1. The smallest part of all matter is called an atom. The answer is (b) Atom.
2. The subatomic particle that is negative is an electron. The answer is (d) Electron.
3. The person who provided the first evidence that atoms contain subatomic particles is J.J. Thomson. The answer is (a) Thomson.
4. When two fluorine atoms share a pair of electrons, the bond that forms is a nonpolar covalent bond. The answer is (c) Nonpolar covalent bond.
5. To find the number of neutrons in an atom, you subtract the atomic number from the mass number. The answer is (b) Mass number - atomic number.
6. Isotopes of an element have the same atomic number, but different mass numbers because they have different numbers of neutrons. The answer is (c) Neutrons.
7. Electrons in the first energy level of an atom have the lowest possible energy. The answer is (b) Have the lowest possible energy.