Test - Atomic Structure Flashcards
1
Q
- An element with 5 protons, 6 neutrons, and 8 electrons has a mass number of …
A
Mass number - 11 NB16
2
Q
- A neutral atom may contain 8 protons _____ neutrons and _______ electrons.
A
9 neutrons and 8 electrons NB14
3
Q
- All elements are composed f extremely small particles called …
A
Atoms NB6
4
Q
- An atom is electrically neutral because …
A
The numbers of protons and electrons are equal NB6
5
Q
- Each family in the periodic table has its own characteristics properties based on the number of …
A
Solutions NB14
6
Q
- Substances CANNOT be broken down chemically into other substances are …
A
Elements NB3
7
Q
- Which of the following would be the most reactive?
A
Iodine NB16
8
Q
- Which of the following would be the best conductor of electricity?
A
Silver NB16
9
Q
- Which particles determine the atomic number of an element?
A
Protons only NB5
10
Q
- The Atomic number of magnesium is 12. Therefore its nucleus must contain …
A
12 protons and no electrons NB16
11
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. NB16
12
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 NB4
13
Q
- Arranged the elements on the periodic table based on atomic number?
A
Henry Mosley NB3
14
Q
- Arranged the elements on the periodic table based on atomic mass?
A
Dmitri Mendeleev NB3
15
Q
- Name a property of a nonmetal
A
Poor conductors NB14
