Test - Atomic structure Flashcards
(23 cards)
- What substance cannot be broken down chemically into other substances?
Elements Notes
- Each family in the periodic table has its own characteristic properties based on the number of what
Valence electrons Notes pg.7
- If the atomic number of magnesium is 12. What should the nucleus contain?
12 protons and no electrons Notes
- A neutral atom may contain 8 protons. What would the neutrons and electrons be?
10 neutrons and 9 electrons Notes
- If an element with 5 protons, 6 neutrons, and 8 electrons, what would the atomic number be?
5 Notes
- If an element with 5 protons, 6 neutrons, and 8 electrons, what would the mass number be?
11 Notes
- The farther an electron is from the nucleus, the more _____ it has.
Energy Notes
- What is the total number of electrons in the outer shell of a sodium atom?
1 Notes
- What is the total number of neutrons in the nucleus of any atom is equal to?
Mass number minus the atomic number Notes
- An unstable nucleus results from too many or too few ____
Neutrons Notes
- Out of the following what does a nucleus of an atom not have?
a) is positively charged
b) is very dense
c) contains nearly all of the atom’s mass
d) contains nearly all of the atom’s volume
Contains nearly all of the atom’s volume Notes
- Why is an atom electrically neutral?
Because the numbers of protons and electrons are equal Notes
- When looking at the halogens on the periodic table, how does the number of valence electrons change as the energy level is increased?
The total number of valence electrons does not change. It remains at 7 Notes
- What are Boron, carbon, oxygen, and nitrogen the same members of?
Period Notes
- Of the following elements, which one would be the best conductors of electricity?
a) iodine
b) silicon
c) silver
d) argon
Silver Notes
- Which of the following elements would be most reactive?
a) iodine
b) silver
c) argon
d) silicon
Iodine Notes
What group is helium in?
Noble Gases Notes
- In each period, how does the number of electrons in each kind of atom change form left to right between groups 1 and 2?
Atoms electrons increase by one because protons increase by one Notes
- Which group contains elements with two valence electrons?
Alkaline earth metals Notes
51a. This element is in the same family as bromine, but has fewer protons than magnesium. What is it?
Fluorine Notes
51a. An isotope of Carbon has 7 neutrons, write this isotope’s notation in Nuclear Form
13C
51b. An isotope of Carbon has 7 neutrons. Write the isotope in hyphen form.
Carbon-13 Notes
51c. An isotope of Carbon has 7 neutrons. Is this the most common form of the isotope?
No because the average atomic mass is 12.011 on the periodic table Notes
