Development of the Periodic Table
Organization of the Periodic Table
Electron Configuration and Lewis Dot Structures
Periodic Trends
Average Atomic Mass
100
Metals are located mostly on the _______ side of the periodic table, while non-metals are mostly located on the _______ side.
Metalloids are located along the _______.
What is left, right, and staircase?
100
What is the name for the outermost electrons?
What are valence electrons?
100
What element is this representing?
What is astatine?
100
A larger atomic radius means an atom is larger or smaller?
What is larger?
100
__________ are atoms of the same element that have different numbers of neutrons and therefore, different mass numbers.
What are isotopes?
200
Identify each as being a metal, non-metal, or metalloid.
a) Br
b) Hf
c) Te
What is Br-non-metal, Hf-metal, and Te-metalloid?
200
Elements in a __________ share similar chemical properties because they share the same number of __________
What are groups (families) and valence electrons?
200
How would the Lewis structure for Bismuth look?
What is
?
200
Which element has the lowest ionization?
Cs, Sr, or Cl
This element has the lowest ionization because its outermost shell is far from having _____ valence electrons.
Would it be harder or easier to remove its valence electron?
What is Cs?
What is 8?
What is easier?
200
What is average atomic mass?
Hint: your answer must mention isotopes
What is the average mass of all the isotopes of an element?
300
________ go up and down while ________ go across
What are groups and periods?
300
Identify the name of following groups on the periodic table:
1, 2, 17, 18
What are
1- Alkali Metals
2- Alkaline Earth Metals
17- Halogens
18- Noble Gases
300
What is the complete electron configuration for Magnesium?
What is 1s22s22p63s2?
300
atomic radius decreases as you move from left to right along a period because the number of ________ increase
atomic radius decreases as you move up a group (bottom to top) because the number of _____ _____ decreases
What is protons?
What are energy levels (shells)?
300
Compute the average atomic mass for silicon:
Round your answer to the hundredth place. Make sure to give the unit.
Round your answer to the hundredth place. Make sure to give the unit.What is 28.09 amu?
400
__________ arranged elements by atomic mass and __________ arranged elements using atomic number
What is Mendeleev and Moseley?
400
The __________ are a group of nonmetallic elements that have high reactivity with group 1 elements because they need 1 more valence electron to fill their outermost shell.
__________ are elements that have filled valence electron shells and are considered inert.
What are halogens and noble gases?
400
What is the noble gas configuration for Tin (Sn)?
What is [Kr]4d¹⁰5s²5p²?
400
Pick the atom from each pair listed below that has the larger atomic radius:
a. Be or Ba
b. Si or S
c. Ga or B
d. Sr or Ag
What is Ba, Si, Ga, and Sr?
400
A 100.0 g sample of magnesium consists of 78.99 g magnesium-24 and 10.00 g magnesium-25 by mass. The atomic mass of Mg-24 is 23.985 amu, and the atomic mass of Mg-25 is 24.986 amuu. What is the average atomic mass of the magnesium sample? Give your answer to the tenths place. Make sure to include your unit.
What is 21.4 amu?
500
Give the name and atomic numbers for each of the following elements:
a) Os
b) Fr
c) Ga
d) P
What is osmium-76, francium-87, gallium-31, and phosphorus-15?
500
Which group of elements have similar chemical properties?
a) Na, Mg, Al
b) C, N, O
c) S, Te, Po
d) I, Se, P
What is c?
500
What is the complete electron configuration of this atom? What is the element?
Hint: count the electrons
What is Chlorine- 1s²2s²2p63s²3p5?
500
Which element has the highest electronegativity?
Sr, Co, As, or O
This element is the highest because its outermost electron shell is close to having _____ valence electrons.
Since it is electronegative it will _______ an electron and become a charged atom called a(n) _______
What is O?
What is 8 valence electrons?
What is gain an electron to form an anion?
500
Element Q is an unknown element. 20Q has abundance of 90.51%, 21Q has abundance of 0.21%, and 22Q has abundance of 9.22%.
Find the average atomic mass of Q and identify the unknown element.
What is Ne with mass = 20.17 amu