Elements and Organization

James is studying chemistry and he came across a term 'pure substance'. According to his understanding, what is a pure substance made of?

• Different types of atoms

• Atoms of the same type

• Atoms of different elements

• Atoms of different compounds

Abigail, James, and Mia are working on a science project. They need to choose a non-metal for their experiment. Which of the following should they choose?

• Copper

• Gold

• Oxygen

• Silver

James, Sophia, and Mia are participating in a science fair. They are given a few items and asked to identify the metals among them. Which of the following items given to them are metals?

• Copper bracelet

• Gold necklace

• Oxygen tank

• Silver spoon

Maya, Samuel, and Ethan are discussing how elements are organized. What method do they discover is used to organize elements?

• In a random order

• In alphabetical order

• In a periodic table

• In a numerical order

Grace, Lily, and Elijah are discussing the periodic table. What information does the periodic table primarily show about elements?

• The number of elements in each period

• The properties of elements

• The atomic mass of elements

• The atomic number of elements

Aria, Elijah, and Avery are discussing the size of atoms in their chemistry class. They want to know what happens to the size of atoms as they move across a period in the periodic table. What can they conclude?

• They get smaller

• They get bigger

• They stay the same size

• They become unstable

In a chemistry class, Aiden and Zoe were discussing the size of atoms. They noticed a trend when moving down a group in the periodic table. What happens to the size of atoms as you move down a group?

• They get smaller

• They get bigger

• They stay the same size

• They become unstable

Liam, Ava, and Elijah are discussing the periodic table in their chemistry class. They are trying to figure out how many groups are there in the periodic table. Can you help them?

• 8

• 12

• 18

• 20

Emma is studying chemistry and comes across an atomic symbol. What does the atomic symbol represent?

• The atomic mass of an element

• The atomic number of an element

• The number of protons in an element

• The name of an element

Priya is conducting a chemistry experiment and needs to know the atomic mass of Hydrogen. Can you help her?

• 1

• 4

• 8

• 16