Atoms
What are the three parts of the atom?
Proton
Neutron
Electron
How is the periodic table read?
A. Up and Down
B. Left to Right
C. It cannot be read in a sequence
B. Left to Right
(Like a Book!)
Jenny knows that the atomic number of the element potassium, K, is 19. She also knows that the average atomic mass can be used to find out how many neutrons are in most atoms of an element. If the average atomic mass of potassium is 39.098, how many neutrons are found in most atoms of potassium?
A. 19
B. 20
C. 39
D. 40
B. 20
To find the amount of neutrons you must substract the atomic number from the rounded atomic mass.
(39-19=20)
What type of substance is always made up of a single type of atom?
A. Mixture
B. Element
C. Molecule
D. Compound
B. Element
What are the protons and neutrons called in the center of the atom
Nucleus
True or False
The periodic table is made for scientists for organization and can be group according to metal, non-metals and metalloids
TRUE
Webb is testing samples of different elements. One sample is a dull, yellow solid that breaks into powdery pieces when he hits it with a hammer. How should Webb classify the yellow solid?
A. As a gas
B. As a metal
C. As a metalloid
D. As a nonmetal
D. Nonmetal
Copper, gold, and iron all have some of the same properties. They are all shiny, and they conduct electricity. They can be hammered into a shape and drawn into a wire. What type of element includes copper, gold, and iron?
A. Gas
B. Metal
C. Nonmetal
D. Metalloid
B. Metal
2
A. Ionic
B. Covalent
A. Ionic
The number 6 appears above the letter C in one box of the periodic table. The number 5 appears in the box to the left of the box labeled C. The number 7 appears in the box to the right of the box labeled C. Which of the following does the number 6 tell you about the element described in the box labeled C?
A. The number of protons in an atom of C
B. The average atomic mass of C
C. The group number of C
D. The period number of C
A. The number of protons in an atom of C
In 1897, Joseph Thomson discovered that atoms contained electrons. He proposed a change in the atomic theory of that time, and the theory was modified because of his discovery. Since Thomson’s discovery, atomic theory has been further modified. What is the best explanation for why scientific theories are modified?
A. Theories more than five years old are out of date
B. Scientists want to prove that the work of other scientists is wrong
C. New evidence that supports a revision prompts scientist to modify the earlier theories
D. So much information is available today that it is harder to focus research and disprove theories
C. New evidence that supports a revision prompts scientist to modify the earlier theories
The atomic number is equal to what?
A. Protons
B. Neutrons
C. Electrons
D. Nucleus
A. Protons
Noble Gases are found in the last vertical row of the periodic table. How many valence electrons do the atoms of these elements have?
A. 8
(A full outer shell)
Quan is an artist who makes jewelry using a technique call hammering. Hammering is when a person uses a mallet or a special hammer and repeatedly hits the material to make patterns or to shape the material. In which area of the periodic table should Quan look to find materials that would be suitable for making this jewelry?
A. Among the nonmetals
B. Among the metalloids
C. Among the metals
D. Among the noble gases
C. Among the metals
(Ms. Smith- draw example on board)
At the bottom below the Elements symbol
A. Neutrons
B. Nucleus
C. Electrons
C. Electrons
How many elements have been identified so far?
A. 57
B. 118
D. 1000
B. 118
Jorge is studying the history of the periodic table. Since 1869, the periodic table has been revised as new elements have been identified. In the modern periodic table, which of the following describes atoms with similar chemical behavior and properties?
A. They have similar atomic masses
B. They are located within the same group
C. They are located within the same period
D. They have the same number of isotopes
B. They are located within the same group
Ella paints three identical pieces of metal different colors. She then makes sure they are the same temperature and places them near each other in direct sunlight for 30 minutes. She records temperature data in a table. Based on the procedure and the data, which explanation tells why the temperatures are NOT the same?
White- 40 degrees
Green- 66 degrees
Black- 70 degrees
A. Each color absorbs a different amount of heat energy
B. A different amount of sunlight strikes each piece of metal
C. The mass of each sample varies, which affects heat absorption
D. The temperatures of the metal pieces vary at the beginning of the experiment
A. Each color absorbs a different amount of heat energy