Download Friday Flashback Science 8 SC-08 1.1.2 Students will understand

Friday Flashback
Science 8
SC-08 1.1.2 Students will understand that matter is made of minute particles called atoms, and atoms are composed of even smaller components.
The components of an atom have measurable properties such as mass and electrical charge. Each atom has a positively charged nucleus
surrounded by negatively charged electrons. The electric force between the nucleus and the electrons holds the atom together.SC-081.1.3Students will understand that the atom’s nucleus is composed of protons and neutrons that are much more massive than electrons.
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Since direct observation of atoms is almost impossible, scientist rely on:
a. Microscopes
b. Proton beam
c. Models
d. X-rays
Dalton and Thomson theorized that atoms were:
a. Divisible
b. Indivisible
c. Unstable
d. Highly reactive
Lord Rutherford found that atoms contain dense central portions called:
a. Neutrons
b. Electrons
c. Nuclei
d. Protons
The Charged Cloud model describes ________ as being part of a diffused cloud varying densities.
a. Atoms
b. Protons
c. Neutrons
d. Electrons
The configuration of eight electrons in the outer orbit of an atom is :
a. An atomic number
b. An isotope
c. An octet
d. An atomic mass
Atoms of an element with different numbers of neutrons are :
a. Isotopes
b. Gamma rays
c. Ground level states
d. Noble atoms
The atoms of radioactive elements emit energy after their:
a. Nuclei disintegrate
b. Protons split
c. Electrons disperse
d. Neutrons become positively charged
The joining together of atomic particles is a process called:
a. Conduction
b. Fusion
c. Particle disperse
d. Neutrons become positively charged
9. Half-life is the amount of time it takes one half of ____________ to decay.
a. An atom
b. A charged particle
c. A neutron
d. A radioactive substance
10. If heat or electrical energy is added to an atom, the electron in the atom will:
a. Be absorbed
b. Increase in number
c. Remain stable
d. Move to a higher energy level