Test - Atomic structure Flashcards
1
Q
- What substance cannot be broken down chemically into other substances?
A
Elements Notes
2
Q
- Each family in the periodic table has its own characteristic properties based on the number of what
A
Valence electrons Notes pg.7
3
Q
- If the atomic number of magnesium is 12. What should the nucleus contain?
A
12 protons and no electrons Notes
4
Q
- A neutral atom may contain 8 protons. What would the neutrons and electrons be?
A
10 neutrons and 9 electrons Notes
5
Q
- If an element with 5 protons, 6 neutrons, and 8 electrons, what would the atomic number be?
A
5 Notes
6
Q
- If an element with 5 protons, 6 neutrons, and 8 electrons, what would the mass number be?
A
11 Notes
7
Q
- The farther an electron is from the nucleus, the more _____ it has.
A
Energy Notes
8
Q
- What is the total number of electrons in the outer shell of a sodium atom?
A
1 Notes
9
Q
- What is the total number of neutrons in the nucleus of any atom is equal to?
A
Mass number minus the atomic number Notes
10
Q
- An unstable nucleus results from too many or too few ____
A
Neutrons Notes
11
Q
- Out of the following what does a nucleus of an atom not have?
a) is positively charged
b) is very dense
c) contains nearly all of the atom’s mass
d) contains nearly all of the atom’s volume
A
Contains nearly all of the atom’s volume Notes
12
Q
- Why is an atom electrically neutral?
A
Because the numbers of protons and electrons are equal Notes
13
Q
- When looking at the halogens on the periodic table, how does the number of valence electrons change as the energy level is increased?
A
The total number of valence electrons does not change. It remains at 7 Notes
14
Q
- What are Boron, carbon, oxygen, and nitrogen the same members of?
A
Period Notes
15
Q
- Of the following elements, which one would be the best conductors of electricity?
a) iodine
b) silicon
c) silver
d) argon
A
Silver Notes
