10SCI Chemistry #2

Elements

100

Which element on the periodic table has the symbol "C"?

Carbon

200

Which number on the periodic table is Silicon?

14

300

Which element on the periodic table has the symbol "Hg"?

Mercury

400

Which number on the periodic table is Europium?

63

500

Which element on the periodic table has the symbol "Cu"?

Copper

Atomic Structure

100

What is the electrical charge on an electron?

Negative

200

Why do most atoms contain neutrons?

To stop the protons from touching

300

Which elements atom has an electron configuration of 2,8,6?

Sulfur

400

What is the electron configuration of Calcium atoms?

2,8,8,2

500

What are valence electrons?

Electrons in the outermost shell

Ions

100

What is the charge on a Hydrogen ion?

Positive (H⁺)

200

What is the charge on a Nitrogen ion, and is it a Cation or an Anion?

3 Negative (N^3-), Anion

300

What is the charge of every ion in Group 13 of the Periodic Table?

3 Positive / 3+

400

If I find that an ion has 53 Protons and 54 electrons, which ion do I have, and what is its charge?

I^- (Iodide)

500

If I find that an ion has 88 Protons and 86 electrons, which ion do I have, and what is its charge?

Ra²⁺ (Radium)

Balancing

100

Is SO₄^2- balanced?

No, because it has a charge

200

Ca(OH)₂ + HCl --> CaCl₂ + H₂O

Is this equation balanced?

No

300

Mg(OH)₂ + HCl --> MgCl₂ + H₂O

Balance this equation

*Remember that you can only ADD (big numbers, small numbers, or brackets), NO shifting or removing*

Mg(OH)₂ + 2HCl --> MgCl₂ + 2H₂O

400

Al(OH)₃ + 2HBr --> AlBr₂⁺ + 2H₂O

Balance this equation

*Remember that you can only ADD (big numbers, small numbers, or brackets), NO shifting or removing (unless you are balancing charges)*

Al(OH)₃ + 3HBr --> AlBr₃ + 3H₂O

500

? → C₆H₁₂O₆ + 6O₂

Use Carbon Dioxide and Water to complete this chemical reaction

6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂

Photosynthesis

Acids/Bases

100

If my universal indicator turns red in solution, did I add it to an acid or a base?

Acid

200

Is Bleach an acid or a base?

Base

300

Phenolphthalein turns pink in the presence of what?

Hydroxide ions (OH^-)

400

Explain the difference between a concentrated solution and a dilute solution

Concentrated solutions have more atoms/ions per volume of solution (eg. per 100ml) than dilute solutions do

500

Explain the process of Neutralisation

When the ratio of Hydrogen (H⁺) ions and Hydroxide (OH^-) ions in a solution becomes balanced the solution is then Neutral as a higher concentration of Hydrogen ions would result in an acidic solution and a higher concentration of Hydroxide ions would result in an alkaline solution.