True or false: You are allowed to eat and drink in the Science lab
False
What are the elements in group 18 called and why are they considered unreactive?
Noble gases - they have a full outer shell
The atomic number of an element shows what?
Number of Protons
What is an Ion?
A Charged particle
Why aren't electrons used to figure out the mass of an atom?
Because electrons are too small, they barley have any mass!
What is this called:
earlenmyer flask
How was the first periodic table organized?
By Boiling point, Melting point, and density
If an element has 10 protons, 20 neutrons an d20 electrons what is its ATOMIC NUMBER
20
Who Discovered the Neutron?
James Chadwick
Name this Part of a Bunsen Burner (B)
Collar
What should you do when testing for odors (smells) in the lab?
Waft
What are the elements in Group 2 called, and how many electrons do they have on the outer shell?
Alkaline Earth Metals - 2 electrons
What do the isotopes carbon-12 and carbon-12 have in common?
Same number of protons
What is the most likely ionic charge of Oxygen?
-2
What element has 17 electrons when Neutral?
Chlorine
What does this symbol mean?
Corrosive
What was Dimitri Mendeleev credited with making?
The 1st Periodic table
From the name - what do we know about oxygen-22? (what does the 22 stand for)
The mass is 22
True or False, all isotopes if a given atom have the same chemical properties?
True
Which scientist did we study die halfway through WWI?
Henry Moseley
What Class is this symbol?
Class D
What is the name, atomic mass and atomic number of the element with the atomic symbol Yb?
Yitterbium, 70, 173.05
How many neutrons are in K-40?
21 neutrons
What kind of bond is created between a metal and a non-metal?
Ionic bond
What is the Lewis Dot Diagram for Se?