What is the name of the group 1 elements in the periodic table?

• Halogens

• Transition metals

• Noble gases

• Alkali metals

Balance the chemical equation: H2 + O2 -> H2O

• H2O2 -> H2 + O2

• 2H2 + O2 -> 2H2O

• H2 + O2 -> H2O2

• 2H2O -> 2H2 + O2

Tags

NGSS.MS-PS1-5

What is the chemical symbol for the element with atomic number 6?

• C

• Carbon

• N

• 12.01

What is the coefficient of O2 in the balanced chemical equation: 2H2 + O2 -> 2H2O

• 4

• 1

• 3

• 2

Tags

NGSS.MS-PS1-5

What is the name of the group 17 elements in the periodic table?

• Transition Metals

• Halogens

• Alkali Metals

• Noble Gases

Balance the chemical equation: Na + Cl2 -> NaCl

• Na + Cl2 -> Na2Cl2

• 2Na + Cl2 -> Na2Cl

• 2Na + Cl2 -> 2NaCl

• Na + Cl2 -> NaCl2

Tags

NGSS.MS-PS1-5

What is the atomic number of the element with symbol Fe?

• 15

• 55.9

• 20

• 26

Tags

NGSS.MS-PS1-1

What is the coefficient of NaCl in the balanced chemical equation: 2Na + Cl2 -> 2NaCl

• 3

• 2

• 4

• 1

Tags

NGSS.HS-PS1-7

What is the name of the group 18 elements in the periodic table?

• Noble gases

• Transition metals

• Alkali metals

• Metalloids

What is the chemical symbol for the element with atomic number 20?

• Fe

• Ca

• Calcium

• 40.78