What do each of the letters mean
K. H. D. M. D. C. M.
K- Kilo
H- hecto
D. Deca
M. Meter
D. Deci
C. Centi
M. Mili
100
Define Atom
The smallest particle of an element that retains it's identity in a chemical reaction
100
What's an Ionic bond
A chemical bond formed between two ions with opposite charges
100
What happens if a plant has a deficiency of potassium?
Scorching Brown color
200
Do you have to tie your hair back before a lab
Yes
200
245.98 km= _ cm
24598000. cm
200
How many groups are in the periodic table
18
200
What's a chemical bond?
a chemical bond that involves the sharing of electron pairs between atoms.
200
What happens if a plant lacks phosphorus
Abnormal dark green color
300
When doing a lab with chemicals you should:
A.) Wear safety goggles
B.) Wear an apron
C.) Pour the chemicals on your arm
D.) Both A and B
D.) Both A and B
300
252 ml and the mass of 500. mg
what is the Density?
1.98 g/ml
300
How many periods on the periodic table
7 periods
300
Is burning paper a chemical change?
yes
300
What are the macronutrients
nitrogen, phosphorus, potassium, calcium, magnesium, and sulfur
400
What do the following words mean?
Controlled experiment
Manipulated Variable
Responding Variable
Controlled Experiment: A test when the person controlling the test changes one variable at a time.
Manipulated Variable: The dependent variable in the experiment
Responding variable: A change that happens in an experiment because the experimenters changed something causing a reaction.
400
200,000 kiloliters into gallons
52834.4 Gallons
400
How many atoms are in a pineapple?
A lot
400
What is silver nitrate made of?
Ions
400
One of the three rules on when something is a significant figure?
Non-zero digits are always significant. Any zeros between two significant digits are significant. A final zero or trailing zeros in the decimal portion ONLY are significant.
500
When diluting an acid do you pour the acid into water? or Pour the water into the acid?
Acid into water
500
.00648 g/ml= x/23.22
.1504656 g
500
Atomic Number for FE
26
500
What's a chemical reaction
a process that involves rearrangement of the molecular or ionic structure of a substance, as opposed to a change in physical form or a nuclear reaction.
500
How many significant figures does 1261.631261 have