A PURE substance represented by a chemical symbol.
100
How many elements can a COMPOUND have?
2 or more
100
What group of elements takes up the majority of the periodic table?
Metals
100
Why are the handles of many pots and pans covered in rubber?
Rubber is a POOR conductor and won't burn your hand when you pick up the pots/pans.
100
What are properties of nonmetals?
Don't conduct, no luster, brittle, many are gases
200
The symbol for sodium is ________ and the symbol for Chlorine is ________.
Na- sodium Cl- chlorine NOT C AND I !!!!!!
200
Which of these is true about a compound?
A. A compound is a MIXTURE of elements.
B. The elements in a compound cannot be separated.
C. Elements in a compounded are BONDED together.
D. Each molecule in a compound contains different elements.
C. Elements in a compound are BONDED together.
200
What elements are located on the "staircase" of the periodic table?
Metalloids
200
How do you calculate density?
HEART TRICK! Mass divided by volume
200
What is the density of an item that has a volume of 20 mL and a mass of 150g?
7.5 g/mL
300
True or False: An element symbol can have 2 capital letters.
FALSE- Elements can have 1 capital letter only
300
Which of these compounds contains a metal?
a. CO2
b. FeO2
C. SiO3
d. Cl
HINT USE YOUR PERIODIC TABLE
b. FeO2 (Fe is Iron)
300
What is #50 on the periodic table?
Tin (Sn)
300
What are signs of a chemical change?
Gas bubbles, change in smell, flash of light, heat or sound produced, fizzing and foaming
300
What size shoe do I wear?
7 1/2
400
Hydrogen, carbon and oxygen are what types of elements?
Nonmetals
400
What is the chemical symbol for the compound we know as salt?
NaCl (Sodium- Na ; Cholrine Cl)
400
What state of matter is hydrogen?
GAS
400
What are properties of metals?
They have luster, conduct heat/electricity, can be hammered into thin sheets
400
What hand do I write with?
LEFTY!!!
500
What is the symbol for boron?
B
500
True or False: A compound is a mixture of elements.
FALSE!!! A compound is 2 or more elements BONDED together.
500
Iodine is #______ on the periodic table.
53
500
A material does NOT conduct, has no luster, can't be hammered into thin sheets. This material is most likely....
A. Iron
B. Silver
C. Clay
D. Aluminum