Scientific Method & Lab Safety
Branch of science studies matter and the changes it undergoes.
What is chemistry?
This safety equipment should be worn immediately upon entering a chemistry lab.
What are goggles?
This subatomic particle determines the identity of an element.
What is a proton?
Atoms of the same element with different numbers of neutrons are called these.
\What are isotopes?
This is what happens to electrons when a cation forms.
What is losing electrons?
The substances on the left side of a chemical equation are called these.
What are reactants?
The step of the scientific method involves proposing a possible explanation.
What is a hypothesis?
The color of a properly adjusted Bunsen burner flame.
What is blue?
This subatomic particle contributes the least to the mass of the atom.
What is the electron?
This number tells how many protons an element has.
Answer: What is the atomic number?
This is the charge of a magnesium ion.
What is 2+?
One sign that a chemical reaction has occurred is this.
What is gas production / color change / precipitate formation / heat or light?
The document that explains chemical hazards and safe handling procedures.
What is an MSDS?
Hottest part of the Bunsen burner flame.
What is the tip of the inner blue cone?
These are the two main parts of the electron cloud model of the atom.
What are the nucleus and the electron cloud?
These elements are found along the stair-step line of the periodic table.
Answer: What are metalloids?
This number of 1+ ions is needed to balance a 3– ion.
What is three?
This nuclear process splits a large nucleus into smaller nuclei.
What is nuclear fission?
Two pieces of information must always be recorded for a quantitative measurement.
What are a number and a unit?
The part of the flame that is the oxidizing flame.
What is the outer flame?
These particles are found in the nucleus of an atom.
What are protons and neutrons?
Most metals are located in this region of the periodic table.
Answer: What is the left side and center?
Na₂S is correctly named as this compound.
What is sodium sulfide?
This nuclear process powers the sun and other stars.
What is nuclear fusion?
Experimental results are very close to each other but far from the accepted value. (Accurate, precise, both, or neither)
What is precise but not accurate?
A yellow flame producing soot means the gas is undergoing this type of burning.
What is incomplete combustion?
An atom with 8 protons and 10 neutrons has this mass number.
What is 18?
The average atomic mass for an element with isotopes of mass 10 (20%) and mass 11 (80%) is this value.
What is 10.8 amu?
Al₂(SO₄)₃ contains this total number of atoms.
What is 17?
Starting with 80 g of a substance with a half-life of 10 years, this mass remains after 30 years.
What is 10 g?