Test - Atomic Structure Flashcards
1
Q
- A neutral atom may contain 8 protons
A
9 neutrons and 8 electrons
2
Q
- Which of the following elements would be the least reactive?
A
Argon
3
Q
- An atom is electrically neutral because
A
The number of protons and electrons are equal
4
Q
- Each family in the periodic table has its own characteristic properties based on the number of
A
Valence electrons
5
Q
- Which of the following elements would be the most reactive?
A
Iodine
6
Q
- The atomic number of magnesium is 12. Therefore it’s nucleus must contain
A
12 protons and no electrons
7
Q
- Electrons travel in fixed orbits around the nucleus of the atom.
A
Neils Bohr
8
Q
- Solid sphere model; elements are atoms with different masses.
A
Dalton
9
Q
- Electron cloud model; surrounding the nucleus is an electron cloud made of shells - electrons do not, however, travel in fixed orbit.
A
Schrodinger and Heisenberg
10
Q
- Arranged the elements on the periodic table based on atomic number.
A
Henry Moseley
11
Q
- Arranged the elements on the periodic table based on atomic mass.
A
Dimitri Mendeleev
12
Q
45
A
-1
13
Q
47.
A
F, Rn, Ihg, Br
14
Q
- List three elements from the group containing the most reactive nonmetals.
A
F, Cl, I
15
Q
- In each period, how does the number of electrons in each kind of atom change from left to right between groups one and two? Explain how you know.
A
The number of electrons increases by one in a period as moves across the period. (Atomic # also increases)
