Carbon: The Building Block for Life

How many protons does carbon have?

• 4

• 6

• 8

• 10

What happens when atoms have fewer than eight electrons in their valence shell?

• They become stable

• They become reactive

• They become inert

• They become non-reactive

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which element's electron dot structure is shown in the diagram?

• Oxygen

• Hydrogen

• Carbon

• Nitrogen

Tags

NGSS.HS-PS1-1

Which of the following elements typically follows the octet rule?

• Helium

• Neon

• Carbon

• Lithium

Tags

NGSS.HS-PS1-1

How does the octet rule affect chemical bonding?

• It prevents bonding

• It encourages bonding to achieve eight valence electrons

• It has no effect on bonding

• It only affects ionic bonds

Tags

NGSS.HS-PS1-1

What is the typical electron configuration goal for atoms according to the octet rule?

• Two electrons

• Four electrons

• Six electrons

• Eight electrons

How many valence electrons does a carbon atom have?

• 2

• 4

• 6

• 8

Tags

NGSS.HS-PS1-1

What is the significance of sharing electrons in covalent bonds?

• It makes atoms unstable

• It stabilizes the valence shells

• It increases atomic number

• It decreases atomic mass

What is a macromolecule?

• A small molecule made of a single element

• A very large molecule built up from smaller chemical structures

• A molecule that cannot form chemical bonds

• A molecule found only in plants

Which macromolecule is part of a lipid?

• The first molecule pictured

• The second molecule pictured

• The third molecule pictured

• None of the above