Test - Atomic Structure Flashcards
- Substance that cannot be broken down chemically into other substances are
Elements Nb pg13
- The measurement of how much matter an object contains is its
Mass Nb pg7
- Each family in the periodic table has its own characteristic properties based on the number of
Valence electrons Nb pg13
- The atomic number of magnesium is 12. Therefore its nucleus must contain
12 protons and no electrons Nb pg7
- A neutral atom may contain 8 protons
9 neutrons and 8 electrons Nb pg13
- The farther an electron is from the nucleus, the more ________ it has
Energy Nb pg6
- The total number of neutrons in the nucleus of an atom is equal to
Mass number minus atomic number Nb pg6
- Which of the following is a transition metal
Nickel Nb pg14
- Which words below is represented by the word period on the periodic table
Energy levels Nb pg15
- The nucleus of an atom has all the following characteristics except that it
Contains nearly all of the atoms mass Nb pg3
- An atom is electrically neutral because
The numbers of protons and electrons are equal Nb pg 12
- When looking at the halogens on the periodic table how does the number of valence electrons change as the energy level increased
The total number of valence electrons does not change. It remains at 7 Nb pg16
- Which of the following elements would be the best conducted of electricity
Silver Nb pg16
34,35,36. How do you find the mass number
Protons + neutrons Nb pg12
- Who arranged the elements on the periodic table based on its atomic mass
Dmitri Mendeleev Nb pg3
- Who said that electrons travel in fixed orbits around the nucleus of the atom
Neil’s Bohr Nb pg4
- List three elements from the group containing the most reactive metal
F, Cl, Br, I, At Nb pg16
- 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
Atoms electrons increase by one because protons increase by one Nb pg13
- Describe one similarity and one difference between the two atoms that I drew. Include why each difference and similarity is expected, based on each elements location on the periodic table
Same = number of valence electrons
Difference = number of energy levels Nb pg16
- An isotope of Carbon has 7 neutrons
a. Write this isotopes notation in nuclear form
b. Write this isotopes 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. 13c
b. Carbon - 13
c. No, because average atomic mass is 12.011 Nb pg16
52.
a. This element is in the same family as Br, but has fewer protons than Mg. It must be
F Nb pg16
52.
b. This element has 6 energy levels and 8 valence electrons. It must be
Rn Nb pg16
52
d. This element is in the family with the most reactive nonmetals and has 4 energy levels. It must be
Br Nb pg16
- Property of metals
Good conducter Nb pg14
- Property of nonnmetals
Poor conductors Nb pg14
- Property of metalloids
Semi conductors Nb pg15
