Chemistry Test I
Atomic Structure and the Periodic Table
Fill in the blank/Short answer.
1.
The atom is made of three elementary particles. Name them.
a. Which two of these particles are present in the nucleus?
b. Which of these particles is negatively charged?
2. What is the force that holds charged particles in an atom together?
a. When subject to this force, similar charges _________ each other and
opposite charges ________ each other.
3. How many valence electrons do elements in group 17 of the periodic table
have?
a. BONUS: What are elements from this group known as, collectively?
4. How many protons and electrons does a neutral atom of Scandium have?
a. BONUS: How many neutrons does a species of Scandium with an
atomic mass of 44 AMU have?
5. How does an ion differ from a neutral atom of the same element?
a. How many protons and electrons does a 2+ ion of Magnesium have?
b. How many protons and electrons does a 1- ion of Flourine have?
c. Name the ion that contains 20 protons and 18 electrons.
6. What is the general name for all positively charged ions?
a. What is the general name for all negatively charged ions?
Electron Configurations
7. Name the elements with the following electron configurations:
a. 1s2
b. [Ar]4s1
c.
[N e]3s2 3p3
d. [Kr]5s2 4d4
e. [Xe]6s2 5d1
8. Give the electron configurations for the following elements (using noble gas
abbreviation when possible):
a. Beryllium
b. Caesium
c. Manganese
d. Rhodium
e. Europium
f. Curium
g. Antimony
h. Bismuth
i. Iodine
j. Radon
Polyatomic Ions
List the chemical forumulae for all the polyatomic ions given. You’ll find the list on
your answer sheet (it makes it a lot easier to fill out and grade!)