• Which metalloid is essential for making computer chips?
Answer 3 – 40
• Silicon (Si)
Question 3 - 50
• How do we use the periodic table to determine the phase of matter for the elements?
Answer 3 – 50
• Gases are in the gun. Group 18 is the barrel. N, O, and F are the handle. Chlorine is the trigger. H is the ejected casing.
• Liquids are Br and Hg. • Everything else is a solid
Question 4 - 10
• What phase of matter is nitrogen (N)?
Answer 4 – 10
• Gas
Question 4 - 20
• What phase of matter in lithium (Li)?
Answer 4 – 20
• Solid
Question 4 - 30
• Where are the gases located on the periodic table? Describe the parts?
Answer 4 – 30
• Group 18 is the barrel.• The handle is N, O, & F• The trigger is Cl.• H is the ejected casing.
Question 4 – 40
• What are the liquids on the periodic table and what memory tricks do we use to remember them?
Answer 4 - 40
• The liquids are bromine and mercury.
• Bromine is in front of the trigger and mercury is the only liquid metal.
Question 4 - 50
• How do we identify the solids on the periodic table?
Answer 4 – 50
• Everything that is not a gas or a liquid.
Question 5 - 10
• An irregular object with a mass of 105 g is placed in a graduated cylinder with a volume of 50 mL. The volume in the cylinder rises to 75 mL. What is the density of the object?
Answer 5 – 10
• D = m/V• m = 105 g• V = 75 mL – 50 mL = 25 mL• D =m / V – 105 g / 25 mL = 4.2 g/mL
Question 5 - 20
• What is the density of a cube with 5 cm sides? The mass of the cube is 750 g.
Answer 5 – 20
• D = m / V• m = 750 g• V = 5 cm x 5 cm x 5 cm = 125 cm3 • D = m / V = 750 g / 125 cm3 = 6 g/ cm3
Question 5 - 30
• The molecules in a sample of matter are separated and moving around independently. What phase of matter is represented?
Answer 5 – 30
• Gas
Question 5 - 40
• What is the boiling / condensation point of the substance represented in the below heating curve?
Answer 5 – 40
• 95 °C
Question 5 - 50
• What is the name and atomic mass of the following atom?