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Chapter 3 Section #4

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Last updated over 3 years ago
17 questions
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Question 1
1.

Question 2
2.

Question 3
3.

Question 4
4.

Question 5
5.

Question 6
6.

Question 7
7.

https://ptable.com/?lang=en#Properties
Question 8
8.

Write the symbol for each element. Use correct upper and lower case letters.

neon

Question 9
9.

Write the symbol for each element. Use correct upper and lower case letters.

calcium

Question 10
10.

Write the symbol for each element. Use correct upper and lower case letters.

radon

Question 11
11.

Write the symbol for each element. Use correct upper and lower case letters.

Flerovium

Question 12
12.

Write the symbol for each element. Use correct upper and lower case letters.

Dubnium

Question 13
13.

Write the symbol for each element. Use correct upper and lower case letters.

Mercury

Question 14
14.

Write the symbol for each element. Use correct upper and lower case letters.

Moscovium

Question 15
15.

Use the law of definite proportions and the equation below to answer the questions. The law of definite proportions states that regardless of the amount, a compound is always composed of the same elements in the same proportion by mass.

Mass percentage of an element (%) = mass of element/mass of compound x 100.

A 20.0-g sample of sucrose contains 8.4 g of carbon. What is the mass percentage of carbon in sucrose? Show your work.

Question 16
16.

Use the law of definite proportions and the equation below to answer the questions. The law of definite proportions states that regardless of the amount, a compound is always composed of the same elements in the same proportion by mass.

Mass percentage of an element (%) = mass of element/mass of compound x 100.

Sucrose is 51.50% oxygen. How many grams of oxygen are in 20.0 g of sucrose? Show your work.

Question 17
17.

Use the law of definite proportions and the equation below to answer the questions. The law of definite proportions states that regardless of the amount, a compound is always composed of the same elements in the same proportion by mass.

Mass percentage of an element (%) = mass of element/mass of compound x 100.

A 2-g sample of sucrose is 6.50% hydrogen. What is the mass of hydrogen in 300. g of sucrose? Explain your reasoning.

A substance that cannot be separated into simpler substances by physical or chemical means is a(n)
period
mixture
compound
element
A chemical combination of two or more different elements is a(n)
solution
element
compound
period
Which of the following is an example of an element?
water
oxygen
sugar
air
Which of the following is an example of a compound?
silver
aspirin
copper
gold
What are the horizontal rows in the periodic table called?
periods
block elements
groups or families
grids
What are the vertical columns in the periodic table called?
grids
periods
block elements
groups or families
Identify each substance as either an element or a compound.
silicon
ice
tungsten
nickel
francium
sodium chloride
carbon dioxide
borax
neptunium
Element
Compound