Chemical and Water Review

What is the first element on the periodic table?

• Helium

• Hydrogen

• Oxygen

• Carbon

Tags

NGSS.HS-PS1-1

Which element is represented by the symbol 'O'?

• Oxygen

• Osmium

• Gold

• Silver

Tags

NGSS.HS-PS1-1

What is the atomic number of Carbon?

• 6

• 12

• 8

• 14

Tags

NGSS.MS-PS1-1

Which group of elements is known as the noble gases?

• Group 1

• Group 2

• Group 18

• Group 17

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the approximate proportion of oxygen in living things?

• 19%

• 10%

• 65%

• 3%

Which element is present in living things at approximately 3%?

• Carbon

• Hydrogen

• Oxygen

• Nitrogen

Which of the following elements is found in trace amounts in living things?

• Carbon

• Sulphur

• Oxygen

• Hydrogen

Which trace element is a component of nucleic acids and cell membranes?

• Sodium

• Phosphorus

• Iron

• Sulphur

What is water (H₂O) made up of?

• Two oxygen atoms and one hydrogen atom

• Two hydrogen atoms and one oxygen atom

• One hydrogen atom and one oxygen atom

• Two nitrogen atoms and one oxygen atom

Tags

NGSS.MS-PS1-1

What charge does the oxygen atom in a water molecule acquire?

• Slightly positive

• Neutral

• Slightly negative

• Strongly positive