Ch.2_atomic weight, moles, periodic table

Anika, Aria, and Priya are working on a chemistry project about different elements. They are currently researching about mercury (Hg). Can you help them find out the atomic weight of mercury?

• 197.59

• 198.56

• 200.59

• 188.27

James, Zoe, and Elijah are in a chemistry class. Their teacher asks them to find the atomic weight of iron for a class project. What is the atomic weight they should report?

• 58.58

• 55.85

• 57.58

• 56.85

Sophia and Daniel are studying for their chemistry exam. They come across a question about naturally occurring carbon, which is composed of 98.93% ¹²C and 1.07% ¹³C. The masses of these isotopes are 12.00000 amu and 13.00335 amu, respectively. Abigail, who is good at chemistry, asks them, 'What is the atomic weight of carbon?'

• 12.01 amu

• 13.00 amu

• 1 amu

• 12.01 g

Henry, Aiden, and Anika are studying for their chemistry exam. They come across a question about naturally occurring chlorine. They find out that it is 75.78% ³⁵Cl (atomic mass 34.969 amu) and 24.22% ³⁷Cl (atomic mass 36.966 amu). They are trying to figure out the atomic weight of chlorine. Can you help them?

• 34.97 amu

• 35.45 amu

• 37.00 amu

• 35.00 amu

Maya, Grace, and Aiden are working on a chemistry project about the periodic table. They are specifically interested in chlorine. Can you help them identify in which period and in which group of the periodic table is chlorine located?

• group 7A

  period 2

• group 7A

  period 3

• group 8A

  period 3

• group 6A

  period 3

Scarlett, Anika, and Nora are studying for their chemistry exam. They come across a question that asks, 'Which two of these elements would you expect to show the greatest similarity in chemical and physical properties: B, Ca, F, He, Mg, P?' They are confused and turn to you for help. What would your answer be?

• He and Ca

• F and P

• B and Ca

• Ca and Mg

During a chemistry class, Harper, Daniel, and Sophia were discussing the properties of elements. They were particularly interested in diatomic molecules. They listed six elements: H, Na, O, N, Ne, P. Can you help them identify which three of these elements exist as diatomic molecules?

• O, Ne, and H

• P, Ne, and Na

• H, Na, and Ne

• H, O, and N

Abigail, Daniel, and Olivia are working on a science project about common sugars. They found that the molecular formula of glucose is C₆H₁₂O₆. Can you help them figure out the empirical formula of glucose?

• CHO

• CH₂O

• CHO₂

• C₆H₁₂O₆

Anika, Sophia, and Samuel are working on a science project. They are examining various substances and need to identify which one is an ionic compound. They have the following options:

CO₂, H₂O, Al₂O₃, Fe, Na

• CO₂

• H₂O

• Al₂O₃

• Fe

• Na