Test Atomic Structure Flashcards
1
Q
- Substances that CANNOT be broken down chemically into other substances?
A
Elements pg 3
2
Q
- The measurement of how much matter in an object contains is its ?
A
Mass pg 7
3
Q
- What is the greatest number of valence of electrons an atom can have ?
A
- Pg 13
4
Q
- The atomic number of magnesium is 12 therefore it’s nucleus must contain?
A
12 protons and no electrons. Pg 16
5
Q
- The farther an electron is from the nucleus, the more ________ it has .
A
Energy. Pg 15
6
Q
- High particles determine the atomic number of an element ?
A
Protons only. Pg 10
7
Q
- The maximum number of electrons that can occupy the 2nd shell of an atom of magnesium?
A
- Pg 10
8
Q
- The nucleus of an atom has all the following characteristics except that it?
A
Contains nearly all the atoms volume. Pg 6
9
Q
- An atom is electrically neutral because ?
A
The number of protons and electrons are equal
10
Q
- When looking at halogens in 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. Pg 16
11
Q
- Which of the following elements would be the best conductor of electricity?
A
Silver. Pg 16
12
Q
- Which of the following elements would be the least reactive ?
A
Silicon. Pg 16
13
Q
- Arranged the elements on the periodic table based on the atomic number?
A
Henry Mosley. Pg3
14
Q
- Solid sphere model ; elements are atoms with different masses?
A
Dalton pg3
15
Q
- Electron cloud model; surrounding the nucleus is an electron cloud made of shells — electrons do not , however , travel in a fixed orbit ?
A
Shrodinger and Heisenburg pg 3
