Intro
How many significant figures are in the number 30.86?
4 sig figs
What is the difference between an element and a compound?
An element consists of ONE atom, a compound contains more than ONE element combined.
What is carbon’s atomic number?
6
what’s the difference between groups and periods on the periodic table?
groups go vertical, periods go horizontal.
what are the two types of bonds?
ionic and covalent
Convert the following temperature into kelvin (100 ℃)
373 K
Draw a particle diagram for CO2 (g)?
First one wins!
How many protons, neutrons, and electrons are in an atom?
11 protons, 12 neutrons, 11 electrons
what is the difference between atomic radius and ionic radius?
ionic radius has either a gain or loss of electrons.
Draw the lewis structure of H-Cl
answers may vary
Calculate the percent error of a student calculating the density of a substance to be 7.56 g/mL but the accepted is 7.14 g/mL
First one to answer
What is the difference between homogeneous and heterogeneous mixtures?
Homogenous mixtures are in fixed proportions (NaCl), heterogenous mixtures are not, and they’re uneven (soil).
Explain how light is emitted in terms of electrons.
Electrons fall from a higher state back down to a lower state, emitting energy in the form of light.
What are the electronegativities of the following elements: Nitrogen, Flourine, Sodium, and Argon.
(N-3.0 , F-4.0 , Na-0.9, and Ar- none)
Explain why a molecule of H2O is bent and not linear
due to the lone pairs, it pushes the molecule down
Explain in terms of the arrangement of atoms how a more dense or less dense arrangement differs.
More dense atoms are tightly packed, less dense atoms are loosely packed together.
What is the process that you would use to remove salt from a saline solution? Explain.
Evaporation consists of boiling the water to let the water evaporate, thus leaving the salt remaining.
What is the electron configuration of potassium in the ground state? Then, write an excited state.
2-8-8-1 (ground) 2-8-7-2 (excited)
n terms of electrons, explain or compare the attactrion of electrons for an carbon atom vs. an oxygen atom.
oxygen has a larger electronegativity, therefore, it is more attracted to electrons.
Name the following compound: Ag2CO3
silver carbonate
Calculate the mass of magnesium in a given volume of 10.6 mL.
0.164 g
Explain how particles are arranged in a solid, liquid, and gas.
Solids are tightly packed, liquids a little bit more spaced, and then gasses are very far apart and move fast.
Draw the lewis structure for an atom AND ion of oxygen. Explain what happens to the electron(s)
First to answer!
Name all of the groups on the periodic table.
alkali metals, alkaline earth metals, transition metals, halogens, and noble gases.
________________________________________________
Write the correct nomenclature for the following compound: PbO2
Lead (IV) Oxide