Central Exam Preparation - Periodic Table

Which branch of Science studies all living organisms?

• Earth Science

• Life Science

• Physical Science

• Environment Science

Which of the following lists of elements forms a group on the periodic table?

• F, Cl, Br, I, At, Ts

• B, Si, As, Te, At, Og

• C, P, Se, I, Rn

• Na, Mg, Al, Si, P, S, Cl, Ar

Which of the following is NOT a sign of a chemical change?

• 1

• 2

• 3

• 4

During which time period was the speed constant?

• 0-10 s

• 10-20s

• 20-30s

• 30-50s

Which numbers on the graph show the changes in state of matter with no change in the temperature of a substance?

• 1 and 3

• 3 and 5

• 2 and 4

• 1 and 5

Which of the following is correct about the classification of elements 1 and 2 below?

• 1 is a metal, 2 is a nonmetal

• 1 is a metalloid, 2 is a nonmetal

• 1 is a metal, 2 is a metalloid

• 1 is a nonmetal, 2 is a metal

Which of the following is useful in electronic devices, such as computers, televisions, and solar cells

• Gold

• Carbon

• Silicon

• SIlver

Which of the following is true according to the figure below?

• Most of an atom's mass is concentrated in a small area called nucleus

• Nucleus contains protons and electrons

• The nucleus' charge is neutral

• Neutrons can be found in the electron cloud

Which of the following is an unbalanced equation?

• 2 KClO3 → 2KCl + 3O2

• CH4 + 2O2 → CO2 + 2 H2O

• Fe2O3 + CO → 2Fe + 2CO2

• H2CO3 → H2O + CO2

Which of the following is FALSE according to the number of significant figures?

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