Science:Christmas Final

What is the atomic number of carbon?

• 12

• 3

• 6

• 8

Which element has the highest atomic mass?

• Hydrogen

• Helium

• Oganesson

• Oxygen

What is the symbol for the element with atomic number 1?

• O

• C

• H

• He

What is the trend of atomic size as you move from left to right across a period in the periodic table?

• stays the same

• decreases

• fluctuates

• increases

What is the trend of ionization energy as you move down a group in the periodic table?

• Remains constant

• Increases

• Decreases

• Fluctuates

Tags

NGSS.HS-PS1-2

What is the balanced chemical equation for the reaction between hydrogen and oxygen to form water?

• H2O -> 2H2 + O2

• H2 + O2 -> H2O

• 2H2 + O2 -> 2H2O

• 2H + O -> H2O

Tags

NGSS.MS-PS1-5

What is the coefficient of oxygen in the balanced chemical equation for the combustion of methane?

• 3

• 2

• 4

• 1

Tags

NGSS.MS-PS1-5

What is the atomic mass of helium?

• 4.0026 u

• 3.1416 u

• 1.0079 u

• 6.0221 u

What is the symbol for the element with atomic number 8?

• H

• He

• O

• C

What is the trend of electronegativity as you move from top to bottom within a group in the periodic table?

• decreases

• increases

• fluctuates

• remains constant