If isotopes have a different number of neutrons, and neutrons have a mass of 1 amu, then isotopes of the same element will have different _______________.
Masses
200
A, B, D, E hrs - What do you do with dead elements?
C hr - What is the name of Mrs. Owens' baby?
*A, B, D, E hrs - Barium
*C hr - Jeremy
200
Describe the structure of an atom.
All atoms have protons, neutrons, and electrons.
300
What did Rutherford discover through his gold foil experiment?
The nucleus has all + in the center and the electrons are around the nucleus.
300
Every element has a different number of _______________.
Protons.
Protons determine the identity of the atom.
300
What is the difference between mass number and average atomic mass?
*Mass number is the # of protons + # of neutrons, it is always a whole number, it is for one specific isotope only, and it is not found on the periodic table.
*Atomic average mass is the average of actual masses, it is not a whole number, it is the weighted average of all isotopes, and it is found on the periodic table.
300
What is the name of Ms. Billman's dog?
Coal
300
What did we use to ignite the burner during our time in the lab?
The striker.
400
What part of Dalton's Theory was proved incorrect by Thomson?
Thomson proved that atoms were divisible (protons, electrons, neutrons)
400
How do you determine the charge of an atom?
Protons - electrons.
400
What are the three steps to finding the average atomic mass?
1. Change the % to a decimal.
2. Multiply the mass by the new decimal.
3. Add together.
400
A, B, D, E hrs - What is as big as you are yet doesn't weigh an ounce?
C hr - How old is Mrs. Owens' baby?
*A, B, D, E hrs - A shadow (or reflection)
*C hr - almost 11 months
400
What are valence electrons?
Electrons located in the outermost shell of the atom that can be shared with another atom.
500
Describe the key points of Dalton's Atomic Theory.
*All matter is made of tiny particles "atoms".
*Atoms cannot be created, divided, destroyed or changed into other types of atoms.
*Atoms of the same element have identical properties.
*Atoms of different elements have different properties.
*Atoms of different elements combine in whole-number ratios to form compounds.
*Chemical changes join, separate or rearrange atoms in compounds.
500
Complete the chart in your review packet.
See Ms. Billman. :)
500
Find the atomic mass of chlorine if Chlorine-35 has a mass of 34.969 amu and Chlorine-37 has a mass of 36.966 amu and is present 24.22% of the time. Please round to three decimal places
35.453
500
Name 3 countries that Ms. Billman has visited.
Germany, Italy, France
500
What is the difference between an ionic bond and covalent bond?
*Ionic bonds are formed between a metal and a non-metal. They are formed by attraction between a + ion (cation) and a - ion (anion). One element gives electron(s) and one takes electron(s).
*Covalent bonds are formed between two non-metals. Covalent bonds share electrons.