Atomic Theory Go Find
Answer the following questions with research from the internet and information found in chapter 4.1 and 4.3
- Describe Democritus contribution to the development of the atomic theory.
- What does the Greek word atomos mean?
- Who was John Dalton and what did he say about all atoms?
- What did Dalton have to back up his theory that Democritus did not have?
- Who what J.J. Thomson?
- What did Thompson discover?
- Describe the plum pudding model.
- Who was Ernest Rutherford?
- What did he discover?
- What experiment did he use to make his discovery?
- Who was Niels Bohr?
- Where did Bohr say electrons could be found?
- What are electron orbitals?
- What are photons and what do they have to do with electrons?
Intro to Atomic Structure Reading Guide
Answer the following questions with information found in chapter 4.2 pg 119-125.
Fill in the chart below from page 119 in your book:Particle / Charge / Mass (kg) / Location in the atom
The 3 particles of the atom are:
Their respective charges are:
1.The atomic number tells you the number of ______in one atom of an element. It also tells you the number of ______in a neutral atom of that element.
2.The atomic number gives the “identity “of an element as well as its location on the Periodic Table. No two elements will have the ______atomic number and the atomic number of a given element never ______.
3.The ______of an element is the total number of protons and neutrons in the______of the atom.
4.The mass number is used to calculate the number of ______in one atom of an element. In order to calculate the number of neutrons you must subtract the ______from the ______.
5.An ______is an atom that has the same number of protons but a different number of neutrons relative to other atoms of the same element.
6.The ______of an element is the average mass of an element’s naturally occurring atom, or isotopes, taking into account the ______of each isotope.
7 .Give the symbol and number of protons in one atom of:
Lithium ______Bromine ______
Iron ______Copper ______
Oxygen ______Mercury ______
Krypton ______Helium ______
8.Give the symbol and number of electrons in a neutral atom of:
Uranium ______Chlorine ______
Boron ______Iodine ______
Antimony ______Xenon ______
9.Give the symbol and number of neutrons in one atom of:
(To get the “mass number”,you must round the “atomic mass ” to the nearest whole number)) Show your calculations.
Barium ______Bismuth ______
Carbon ______Hydrogen ______
Fluorine ______Magnesium ______
Europium ______Mercury ______
10.Name the element which has the following numbers of particles:
a.26 electrons,29 neutrons,26 protons ______
b.53 protons,74 neutrons ______
c.2 electrons (neutral atoms)______
d.20 protons ______
e.86 electrons,125 neutrons,82 protons (charged atom
f.0 neutrons ______
11.If you know only the following information can you always determine what the element is? (Yes/No).
a. number of protons ______
b.number of neutrons______
c.number of electrons in a neutral atom______
d.number of electrons______