Click on the DEVELOPMENT OF THE MODEL OF THE ATOM banner and the ATOMIC STRUCTURE, ISOTOPES AND ELECTRONIC SHELLS banner below to watch the YouTube video on The Structure of the Atom and the Nucleus. While watching the videos, write down the answers to the questions on the right side of the link. The answers to the questions from each of the 3 sections of the unit will account for 70% of your unit grade. When you complete each section, submit your answers via the link below. The link will send you to a Google Forms document where you will input your answers to the section's questions. Unit assessments will be released on Thursdays. After you have submitted your answers for each of the 3 sections AND the unit assessment, you will receive a grade for the unit.
Your answers to the questions below need to be manually submitted via a Google Forms document, using the link (button) on the right.
According to Atomic Theory, everything is made of tiny particles that cannot be ______________ ______________ further.
J.J. Thomson proved that the atom could not be a solid sphere and must contain ______________ charged particles.
The Nuclear Model proposed by Ernest Rutherford stated that an atom had a compact with a ______________ cloud around the central nucleus.
Neils Bohr proposed an adjustment to the Nuclear Model that described electrons as being ______________ ______________ around the nucleus, held in shells.
Ernest Rutherford and James Chadwick concluded that the nucleus must contain small, discreet particles called ______________ and neutrally charged particles called neutrons.
If you look at a Periodic Table, each box has a nuclear symbol on the right side. On the bottom left is the Atomic Number which tells how many ______________ an atom has. The top number is the Mass Number which is the total number of ______________ and ______________.
In an atom, number of ______________ and ______________ are the same.
Isotopes are elements with the same number of ______________, but a different number of ______________.
Only one or two isotopes of an element are stable, the rest are unstable and decay into other elements by radiating ______________, ______________ and ______________ rays.
An “excited” electron will jump to a higher energy level. Because it is unstable, it will fall back and re-emit its energy as ______________ ______________.