Tools and Lab Safety
What does lab safety prevent?
unnecessary dangers or hazards.
What PH is neutral?
7
What element has the most electronegativity?
Fluorine
What 3 things make up all atoms?
Protons, neutrons, and electrons.
What is an element?
A pure substance made of a single type of atom.
What is proper lab attire?
Closed-toe shoes, pants, pulled-back hair, and non-baggy clothes.
Is a PH of 4 acidic or basic?
Acidic
What nonmetal element has the highest melting point?
Carbon
What is the difference between an atom and a molecule?
A molecule is made up of 2 or more atoms and an atom is just a single unit.
The atomic number of an element tells us what about that element?
The number of protons
If a student catches fire in the lab what should you do?
You should tell the student to stop drop and roll while also removing flaming garments then tell the teacher while grabbing the fire blanket.
PH is the measure of the concentration of what?
Hydrogen Ions
Name 3 different trends on the periodic table.
Electronegativity, ionization energy, electron affinity, atomic radius, melting point, and metallic character.
Describe what the valence electrons of atoms are.
Valence electrons are the electrons in the outermost shell, or energy level, of an atom.
He, Ne, Ar, Kr, Xe, Rn, Og are all a part of what group on the periodic table?
The noble gases
Name 3 types of glassware found in a lab.
Test tube, graduated cylinder, beaker, Erlenmeyer flask, etc
What is the POH of a solution containing a hydrogen ion concentration of 1∗10-8?
6
Why is the electronegativity value of most noble gases zero?
This is because the noble gases have a full outer shell and do not want any more electrons.
How are Ions formed?
Ions are formed by the addition or removal of electrons to/from, neutral atoms or molecules, or other ions
Labs can only produce this kind of isotope.
Unstable isotopes
Explain the steps to safely operate a bunsen burner.
1. connect the hose end of the bunsen burner to a gas nozzle. 2. Turn the gas on. 3. Use a striker to ignite the gas. 4. adjust air intake to the desired level.
What is the hydrogen ion concentration of a PH of 4.7?
1.9953*10-5
What is the order from the smallest radius to the largest radius of C, Zn, Y, Ne, Cs, Ag?
Ne, C, Zn, Ag, Y, Cs
Using electron configuration what element has the following electron configuration: 1s2 2s2 2p4
O, Oxygen
Name all four blocks on the periodic table and where they are.
S block is the left two columns, D block is the middle section, P block is the right 6 columns, and F block is the two separated rows.