S1 Final Exam Chemistry

Front

Balance the equation: CF4 + Br2 → CBr4 + F2

Back

1,2,1,2

Front

Which of the following does NOT form a precipitate? Pb(NO3)2(aq) + 2KI(aq) →, Sr(NO3)2(aq) + K2SO4(aq) →, AgNO3(aq) + Na2S(aq) →, Pb(NO3)2(aq) + AgNO3(aq) →

Back

Pb(NO3)2(aq) + AgNO3(aq) →

Front

Electronegativity is...

Back

the ability of an atom to attract/accept electrons

Front

Which element has the highest electronegativity? W, X, Y, Z

Back

W

Front

Name groups 3B - 12B on the periodic table.

Back

transition metals

Front

What is the definition of a precipitate?

Back

A solid that forms and settles out of a liquid mixture.

Front

What is the periodic trend for electronegativity?

Back

Electronegativity increases across a period and decreases down a group.

Front

What are the main characteristics of transition metals?

Back

They are good conductors of heat and electricity, have high melting points, and can form various oxidation states.

Front

What is the significance of balancing chemical equations?

Back

It ensures that the law of conservation of mass is obeyed.

Front

What is the formula for calculating the number of moles?

Back

Number of moles = mass (g) / molar mass (g/mol).