Test - Atomic Structure Flashcards
1
Q
- A neutral atom may contain 8 protons…
A
9 neutrons, 10 electrons
NB pg. 8
2
Q
- An atom is electrically neutral because…
A
The #s of p+ and e- are equal
NB pg. 7
3
Q
- The measurement of how much matter an object contains is its…
A
Mass
NB pg. 7
4
Q
- Which of the following elements would be the most reactive?
Si, Ag, Ar, I
A
I
NB pg. 13
5
Q
- An unstable nucleus results from too many or too few _____
A
Neutrons
NB pg. 7
6
Q
- The farther an electron is from the nucleus, the more ____ it has
A
Energy
NB pg.
7
Q
- Which particles determine the atomic # of an element?
A
Protons only
NB pg. 7
8
Q
- The atomic # of Mg is 12. Therefore it’s nucleus must contain…
A
12 protons and and no electrons
NB pg. 7
9
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 # of valence electrons does not change. It remains at 7
NB pg. 13
10
Q
- B, C, N, and O are all members of the same_____
A
Period
NB pg. 13
11
Q
- Electrons travel in fixed orbits around the nucleus of the atom.
A
Niels Bohr
NB pg. 4
12
Q
- Solid Sphere Model; elements are atoms w/ different masses
A
Dalton
NB pg. 3
13
Q
- Electron Cloud Model surrounding the nucleus is an electron cloud made of shells - electrons do not, however, travel in fixed orbits.
A
Shrodinger and Heisenberg
NB pg. 4
14
Q
- Calcium - 42
A
n0
NB pg. 7
15
Q
- 10Be
A
p+, n0
NB pg. 7
16
Q
- A) this element is in the same family as Br, but has fewer protons than Mg. It must be__
B) this element has 6 energy levels and 8 valence electrons. It must be__
C) this element is in the alkaline earth metals group and has 3 energy levels. It must be _
D) this element is in the family w/ the most reactive non metals and has 4 energy levels. It must be__
A
A) F B) Rn C) Mg D) Br
NB pg. 14
17
Q
- List three elements from the group containing the most reactive non metals.
A
F, CL, Br, I, At
NB pg. 13
18
Q
- In each period, how does the # of electrons in each kind of atom change from left to right between groups 1 and 2? Explain.
A
# of e- increases by 1 in a period as moves across the period. NB pg. 13
19
Q
- Property of non metals?
A
Poor conductor
NB pg. 14
20
Q
- a) write this isotope’s notation in Nuclear form.
b) write this isotopes notation in hyphen form.
A
a) 13C b) Carbon - 13
21
Q
- Describe one similarity and one difference between the two atoms you drew above. Include why each difference between and similarity is expected based on each element’s location on the periodic table.
A
Same = # of valence e- = group diff = # of energy levels (4vs2)
NB pg. 8
