1
Which four chemical elements mainly make up the mass of the human body?
2
Which of the following is the correct symbol for the element oxygen?
3
What are the main elements that make up most of the Earth’s crust?
4
Which two gases mainly form the Earth's atmosphere?
5
What can vary in the Earth's atmosphere between low and higher amounts?
6
Which element is important in the human body but is not one of the main elements of the Earth's crust?
7
What are the three main subatomic particles, and what are their charges?
8
Where in the atom is each subatomic particle located?
9
What is the relative mass of a proton, neutron, and electron?
10
What does the atomic number of an element represent?
11
How do you calculate the number of neutrons in an atom?
12
Electrons are located in the nucleus of the atom.
13
Which of the following subatomic particles determines the identity of an element?
14
Which of the following best describes isotopes?
15
Which subatomic particle varies between isotopes of the same element?
16
Carbon has three naturally occurring isotopes: C-12, C-13, and C-14. What do these numbers represent?
17
Isotopes of the same element always have different chemical properties.
18
Which of the following pairs are isotopes of the same element?
19
Which of the following statements is true about isotopes?
20
What did Dalton’s atomic model propose?
21
How did Thomson describe the structure of the atom in his model?
22
What observation led Rutherford to propose his atomic model?
23
What is the main difference between Bohr’s model and Rutherford’s?
24
What was one limitation of Thomson’s model that Rutherford’s model addressed?
25
Dalton's atomic theory stated that atoms could be divided into smaller particles.
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