Core 10

Vocabulary

100

A positively charged ion

What is a cation?

200

Electrons in the outermost shell.

What are valence electrons?

300

An ion made of two or more atoms

What is a polyatomic ion?

400

A measure of the ability of an atom in a chemical compound to attract electrons.

What is electronegativity?

500

A change in matter that does not involve a change in the identity of the substance.

Bonus: Give an example

What is physical change?

Balancing equations

100

_H₂ + _Cl₂ -> _HCl

1 H₂ + 1 Cl₂ -> 2 HCl

200

_C + _S₈ -> _CS₂

1 C + 1 S₈ -> 4 CS₂

300

_K + _ B₂O₃ -> _K₂O + _B

6 K + 2 B₂O₃ -> 3 K₂O + 6 B

400

_C₇H₆O₂ + _O₂ -> _CO₂ + _H₂O

2 C₇H₆O₂ + 15 O₂ -> 14 CO₂ + 6 H₂O

Product creation

100

AgNO₃ + NaCl -> ???

AgCl + NaNO₃

200

BaCl₂ + Na₂SO₄ -> ???

BaSO₄ + NaCl

300

CuSO₄ + Na₂CO₃ -> ???

CuCO₃ + Na₂SO₄

400

Zn(NO₃)₂ + (NH₄)₂S -> ???

ZnS + NH₄NO₃

500

Ca(OH)₂ + H₃PO₄ -> ???

Bonus: Balance the equation

Ca₃(PO₄)₂ + H₂O

Ions

100

The charge of a sodium ion.

What is a +1 charge?

200

The type of ion formed when an atom gains one or more electrons.

What is an anion?

300

The charge on a nitrate (NO₃) ion.

What is a -1 charge?

400

The formula and charge of a phosphate ion.

PO₄​^2-​​​

500

The type of ion that metals generally form.

What is a cation?