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
i think 6 is actually c
1. To find the answer to the first question, you can read through the options and identify which one refers to the smallest part of all matter. In this case, the answer is "b. Atom." Atoms are the basic units of matter and consist of subatomic particles such as protons, neutrons, and electrons.
2. To determine which subatomic particle is negative, you can go through the options and identify the one that carries a negative charge. The correct answer is "d. Electron." Electrons are negatively charged particles that orbit around the nucleus of an atom.
3. To find out who provided the first evidence that atoms contain subatomic particles, you can analyze the options and consider the contributions of each scientist. The correct answer is "a. Thomson." J.J. Thomson conducted experiments that led to the discovery of electrons and suggested that atoms consist of smaller subatomic particles.
4. To determine the type of bond that forms when two fluorine atoms share a pair of electrons, you can look at the options and consider the nature of the bond. The correct answer is "c. Nonpolar covalent bond." Fluorine atoms share their electrons equally, resulting in a nonpolar covalent bond.
5. To calculate the number of neutrons in an atom, you need to understand the relationship between the atomic number and the mass number. The correct answer is "b. Mass number - atomic number." Subtract the atomic number from the mass number to obtain the number of neutrons.
6. To understand why isotopes of an element have the same atomic number but different mass numbers, you need to know the definition of isotopes. The correct answer is "c. Neutrons." Isotopes are atoms of the same element that have different numbers of neutrons, which affects their mass numbers.
7. To determine the energy level of electrons in the first energy level of an atom, you need to consider the options and their descriptions. The correct answer is "b. Have the lowest possible energy." Electrons in the first energy level have the lowest amount of energy and are closest to the nucleus of the atom.