Test: Atomic Structure Flashcards
1
Q
- What does each family on the periodic table have its own characteristic properties based on the number of what?
A
Valence electrons
pg. 13
2
Q
- The atomic number of magnesium is 12. So how many how may protons should the nucleus contain?
A
12 protons
pg. 16
3
Q
- What is the atomic number of an element with 5 proton, 6 neutrons, and 8 electrons?
A
5
pg. 16
4
Q
- Which particles determine the atomic number of an element?
A
Protons only
pg. 7
5
Q
15.What is the total number of neutrons in the nucleus of an atom?
A
Mass number minus the atomic number
pg. 7
6
Q
- What does an unstable nucleus result from too many or too few of?
A
Neutrons
pg. 5
7
Q
- Why is an atom electrically neutral?
A
The numbers of protons and electrons are equal
pg. 7
8
Q
- Which element would be the least reactive?
A
Silicon
pg. 16
9
Q
- What is the the Isotope symbol and Mass number for Helium?
A
Isotope: 5He
Mass number: 5
pg. 16
10
Q
- Who arranged the elements on the periodic table based on atomic number?
A
Henry Mosely
pg. 4
11
Q
- Who made the Solid Sphere Model; elements are atoms with different masses.
A
Dalton
pg. 3
12
Q
- Who made the Nuclear Model? Gold Foil experiment allowed him to discover that the nucleus was positively charged center of the atom surround by negatively charged electrons.
A
Ernest Rutherford
pg. 3
13
Q
- Who arranged the elements on the periodic table based on atomic mass?
A
Dmitri Mendeleev
pg. 3
14
Q
- An Isotope has 7 neutrons. (a.) Write this isotope’s notation in Nuclear form. (b.) Write this isotope’s notation in Hyphen Form. (c.) Is this the most common form of the isotope? Explain how you know if it is or isn’t.
A
3C, Carbon - 13. No, because any atomic mass is 12.011, on PT - common 12C
pg. 16
15
Q
- How many neutrons does Calcium have?
A
22n
pg. 16
