Y10 Work Experience Super Quiz - Chemistry

How many elements does PbNO₃ have?

• 2
• 3
• 4
• 5

Tags

NGSS.MS-PS1-1

How many nitrogen atoms does NH₃ have?

• 1
• 2
• 3
• 4

Tags

NGSS.MS-PS1-1

What is the reactant in the following equation?
2NaHCO₃  -> Na₂CO₃  +  CO₂  + H₂O

• NaHCO₃
• Na₂CO₃
• CO₂
• H₂O

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following describes the law of conservation of mass?

• In a reaction, atoms are created or destroyed.
• In a reaction, atoms are not lost or made.
• In a reaction, the mass of the product may be more or less than the reactants.
• In a reaction, mass never stays the same.

Tags

NGSS.MS-PS1-5

For the equation:
2H₂ +  O₂ --> 2H₂O
How much H₂O will be produced if we react 4g of H₂ and 32g of O₂?

• 4g
• 32g
• 36g
• 28g

An atom is electrically neutral because

• the numbers of protons and neutrons are equal.

• the numbers of protons and electrons are equal.

• neutrons balance the protons and electrons.

Which of the following does the nucleus contain?

• protons and electrons

• neutrons and electrons

• protons and neutrons

Tags

NGSS.HS-PS1-8

Which of the following statements is correct?

• Protons are positively charged and neutrons are negatively charged.

• Protons are negatively charged and electrons are positively charged.

• Protons are positively charged and electrons are negatively charged.

Who is the person credited with the formation of the "plum pudding" model?

• Thomson

• Rutherford

• Bohr

• Dalton

Which model of the atom is denoted as the "plum pudding" model?

• A

• B

• C

• D

• E

Tags

NGSS.MS-PS1-1