The basis of chemical symbols

How many different TYPES of atoms are in H₂O? 水中有几种类型的原子？

• 0

• 1

• 2

• 3

What elements make up a water molecule (H₂O)? Choose all that apply. 组成水分子的元素有什么？多选题

• hydrogen

• nitrogen

• oxygen

• carbon

The blue numbers in the image below represent ________

• chemical reactions

• chemical symbols

• subscripts

How many hydrogen atoms are in a glucose molecule (葡萄糖分子)?

• 1

• 3

• 6

• 12

What is the atomic mass of hydrogen?

• 1

• 1.008

• hydrogen

• H

What is the atomic number of oxygen?

• 8

• 16

• oxygen

• O

What is the atomic number of carbon?

• 6

• 12.01

• carbon

• C

What is the chemical symbol of hydrogen?

• 1

• 1.008

• hydrogen

• H

What is the 'stick' that 'glues' two hydrogen atoms together called? 把两个氢原子粘在一起的棒叫什么？

• atom

• molecule

• chemical bond

• symbol

The attractive force that holds two atoms of a compound together.

• Chemical Bonds

• Magnetism

• Gravity

• Weak Force