Chem Unit Test (Oct. 7)

Question 1

What did Dobreneier do

Answer 1

Made Triads (groups in periodic table of 3)

Question 2

Newlands

Answer 2

arranged elements in groups of 8

Question 3

Mendeleev

Answer 3

Credited with the modern periodic table shape, arranged his table in order of increasing atomic mass.

Question 4

rutherford

Answer 4

figured out the structure of atoms

Question 5

Moseley

Answer 5

Discovered the unique atomic numbers

Question 6

What is an Isotope?

Answer 6

An atom that has gained or lost neutrons, changing the mass but not the atomic number

Question 7

Order of periodic table columns

Answer 7

Alkali Metals, Alkaline Earth, Metals, Metalloids, Non metals, Halogens, noble gases

Question 8

What do all the elements in the same horizontal row have in common?

Answer 8

same # of orbits

Question 9

What do all the same elements in same group have in common

Answer 9

same # of valence electrons; their ions have the same charges

Question 10

Atomic Radius

Answer 10

The estimated size of an element from the nucleus to the outer perimeter

Question 11

Atomic radius …… As you move left to right and why

Answer 11

Gets smaller; add more protons and electrons, making the attraction stronger and pulling shells closer

Question 12

Ionization energy Definition

Answer 12

the energy needed to remove an electron from a gaseous atom

Question 13

Ionization energy ___ as you go left to right on the periodic table and why

Answer 13

Increases (because you need more energy bc shells are so close together) Ionization energy gets weaker as you move down a family

Question 14

Multiple Ionization energy (Describe)

Answer 14

Taking of more than 1 electron from a gaseous atom ; It gets harder to take more and more electrons from an atoms because protons pull harder when losing electrons

Question 15

Electron Affinity

Answer 15

energy released when an electron is ADDED to a gaseous atom

Question 16

Electronegativity

Answer 16

the strength of attraction an atom has for electrons while in a chemical bond

Question 17

Elecronegativity __ as you go left to right

Answer 17

Increases because there’s more protons to attract electrons

Question 18

Electronegativity ___ as you go down a column (family)

Answer 18

Decreases because theres more orbits

Question 19

Electronegativity’s role in types of Bond

Answer 19

More electronegative elements have the tendency to form higher ionic character bonds with other elements

Question 20

Ionic Compounds

Answer 20

(Non metal takes electrons from metals)

Question 21

Covalent Bonds:

Answer 21

Two bullies (Non metals) share electrons

Question 22

Polar Covalent bonds

Answer 22

two non metals sharing in an unequal way because one is stronger than the other

Question 23

What is an ion and how are they formed

Answer 23

an ion is a charged atom and they are formed when electrons are removed or added to an element.

Question 24

Octet Rule

Answer 24

Elements want a full valence shell with 8 electrons