Test - Atomic Structure Flashcards
(21 cards)
1
Q
- The nucleus of isotope A of an element has a larger mass than isotope B of the same element. The number of neutrons in the nucleus of isotope A is _________ the number of neutrons in the nucleus of isotope B
A
Greater than the number of neutrons
NB pg 8
2
Q
- Which of the following elements would be the least reactive?
A
Argon
NB pg 16
3
Q
- What is the correct electron arrangement for sulfur?
A
2-8-6
NB pg 16
4
Q
- An atom is electrically neutral because
A
The number of protons and electrons are equal
NB pg 5
5
Q
- Each family in the periodic table has its own characteristic properties based on the number of
A
Valence electrons
NB pg 5
6
Q
- Substances that CANNOT be broken down chemically into other substances are
A
Elements
NB pg 5
7
Q
- The measurement of how much matter in an object contains is its
A
Mass
NB pg 7
8
Q
- Which of the following elements would be the most reactive?
A
Iodine
NB pg 16
9
Q
- Which of the following elements would be the best conductor of electricity?
A
Silver
NB pg 16
10
Q
- An unstable nucleus results from too many or too few
A
Neutrons
NB pg 5
11
Q
- The atomic number of magnesium is 12. Therefore it’s nucleus must contain
A
12 protons and no electrons
NB pg 16
12
Q
- Electrons travel in fixed orbits around the nucleus of the atom
A
Niels Bohr
NB pg 3
13
Q
- Solid sphere model; elements are atoms with different masses
A
Dalton
NB pg 3
14
Q
- Named the atom based on the Greek word meaning indivisible
A
Democritus
NB pg 3
15
Q
- Arranged the elements on the periodic table based on atomic number
A
Henry Mosley
NB pg 4
16
Q
- Arranged the elements on the periodic table based on atomic mass
A
Dmitri Mendeleev
NB pg 4
17
Q
- Nuclear model; gold foil experiment allowed him to discover that the nucleus was the positively charged center of the atom surround by negatively charged electrons
A
Ernest Rutherford
NB pg 4
18
Q
- Plum pudding model; atom is positive sphere with negatively charged particles evenly embedded throughout
A
JJ Thompson
NB pg 4
19
Q
- How do you write a nuclear form isotope?
A
You write the atomic mass small in the corner with the symbol for the element
NB pg 8
20
Q
- List three elements from the group containing the most reactive non metals
A
F, Cl, Br
NB pg 16
21
Q
- In each period how does the number of electrons in each kind of atom change from left to right between Groups 1 and 2? Explain how you know.
A
Number of electrons increases by 1 in a period moves as moves across the period (atomic mass)
NB pg 16
