Chemistry S.3.1

Question 1

Which of the following neutral atoms would have 10 protons, 11 neutrons, and 10 electrons?
A. Neon
B. Sodium
C. Calcium
D. Boron

Question 2

Two isotopes of carbon are found, one with an atomic mass of 12 and the other 14. Which of the following best describes how these isotopes differ?
A. The number of protons and electrons is different.
B. Carbon 12 has fewer protons than carbon 14.
C. Carbon 14 has more neutrons than carbon 12.
D. Carbon 12 has two fewer electrons than carbon 14.

Question 3

A neutral atom of calcium has two electrons in its outer shell. Which of the following will occur when calcium forms an ion?
A. Calcium will lose two electrons to have a full valence shell.
B. Calcium will gain two electrons to have a full valence shell.
C. Calcium will add two protons to become neutral.
D. Calcium will add six electrons to have a full valence shell

Question 4

Which of the following best describes an oxygen atom with 8 protons and 10 electrons?
A. An anion with a -2 charge
B. A cation with a +2 charge
C. An anion with an atomic mass of 18
D. A cation with a positive charge of +2

Question 5

Use information in the periodic table to complete the following chart.

1. The element name is Hydrogen. Find the element symbol, proton number, neutron number, electron number, atomic number, and the atomic mass(amu).
2. The element symbol is N, proton number is 7, and atomic mass(amu) is 14. Find the element name, neutron number, electron number, and number.
3. The proton number is 78 and the neutron number is 117. Find the element name, element symbol, electron number, atomic number, and atomic mass (amu).
4. The element name Chlorine, and atomic mass (amu) is 35. Find the element symbol, proton number, neutron number, electron number, and atomic number.
5. The element symbol is K, electron number 19, and the atomic mass (amu) is 39. Find the element name, proton number, neutron number, and atomic number.
6. The element symbol is He, and the atomic number is 2, and the atomic mass (amu) 4. Find the element name, proton number, the neutron number, and the electron number.