Scientific Method
What is the scientific method?
process of experimentation to prove theories and hypotheses
What is the formula for density?
D= M/V
What are families and periods on the periodic table?
Families- vertical columns
Periods- horizontal rows
What's that difference between chemical and physical reactions?
Chemical reactions make new substances. Physical reactions only changes the state of matter of the substance.
Whats the smallest unit of matter?
An atom
How many steps in the scientific method
5
What is weight?
The gravitational force applied on object.
or the mass
Where are metalloids?
on the zig zag
Give an example of a chemical reaction
Milk going bad
grass growing
wood burning
etc
What is an element?
A pure substance made up of atoms
What's the first step of the scientific theory?
observation
D= ?
M=300g
V=10ml
D= 30g/ml
Draw the Lewis dot structure for Ca2C
Ca=C=Ca
Give an example of a physical reaction
ice melting
wrinkling a paper
melting metal
What is a compound?
2 or more elements chemically combined
What are all the steps in the scientific method?
Observation, Hypothesis, experiment, data collection/analyze, results/communication
D= 20g/ml
M=?
V= 15ml
300g
What is the atomic mass and atomic number of Sb?
Atomic mass- 122
Atomic number- 51
What are the products? What are the reactants?
CO2 + H2O ---> H2CO3
Products: H2CO3
Reactants: CO2 and H2O
What makes up an atom?
Proton, electron, and neutrons
What do we base the experiment on?
the hypothesis
D= 12g/ml
M= 192g
V=?
16 ml
DOUBLE JEOPARDY 2x points
How many protons, electrons, and neutrons are in Krypton-2?P= 36
E=38
N= 48
What are the 4 states of matter
solid, liquid, gas, and plasma
What are the locations and charges of the proton, electrons, and neutrons on the atom?
Protons and Neutrons - inside, +
electrons- outside, -