Flashcards in Chemistry Deck (135)
* Kilo (k)
* Centi (c)
* Milli (m)
Getting the correct number of sig figs when adding or subtracting
Must have the same decimal places as the least certain # used in question
11 + 9.2 = 20.2
Getting the correct number of sig figs when multiplying or dividing
Must have the same # of sig figs as the factor with the least # of sig figs
2.89 x 4.01 = 11.6
Density = mass/volume
Draw your circle with a T in the middle. Then it is M on top of T, then d to the left and v to the right (mountains over deep valleys)
Metals are characterized by
Malleability, ductility (molded/shaped),
Luster, conductivity and their ability to assume a (+) electric charge
Non Metals tend to be:
Brittle, dull, non-conductive and assume negative charges or remain neutral
As you move left along a period (or down a group) the metallic properties generally
Metallic properties increase going left along a period or down a group
Why is hydrogen in group 1 and 17?
Because it may behave as metallic or non-metallic depending on the circumstance
Definition of Atomic number:
Number of protons in the nucleus
How are the elements arranged by what?
By their atomic number (number of protons)
Definition of Atomic Mass:
Number of protons and neutrons
The Alkali Metals are in what group?
The Alkaline earth metals are in what group?
The halogens are in what group?
The noble gases are in what group?
What is the combining capacity of group one (alkali metals)
What is the combining capacity of group 2 (alkaline earth metals)
What is the combining capacity of group 3 elements
What is the combining capacity of group 13 elements
-3 (except Tl, it can be +1 as well)