FREE AND STUDY GAMES ABOUT ELEMENTSREYNOLDS

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FREE AND STUDY GAMES ABOUT ELEMENTS(REYNOLDS)

EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -30 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: How was Mendeleyev able to predict the exisitance of elements that had not yet been discovered?

Answer:

organized elements by weight in rows and chemical properties in columns

Question 2: Which of the nine substances are made of 4 elements?

Answer:

NAHCO3

Question 3: How many different elements are in the nine substances?

Answer:

3

Question 4: How do you tell if there is a new element in a formula?

Answer:

The capital letters

Question 5: How many elements are in the substance water

Answer:

2

Question 6: Parts of a chemical formula

Answer:

elements, subscripts, coefficiants Question 7: How can there be so many different substances in the world if there are only a few elements that are common?

Answer:

Elements can combine with each other in a million different ways.

Question 8: Sodium Carbonate

Answer:

Na2CO3

Question 9: what's a coefficient?

Answer:

tell us how many molecules there are of a substance.

Question 10: sodium Chloride

Answer:

NaCI

Question 11: How are matter and elements related?

Answer:

Matter is made of elements and elements combine to make matter.

Question 12: how many elements are in the substance carbon dioxide?

Answer:

2

Question 13: how many chemicaly combined atoms make up a molecule?

Answer:

• or more

Question 14: which of the nine substances are made of 2 elements?

Answer:

NACL and CACI2

Question 15: which of the nine substances are made of three elements?

Answer:

CACO3 and MGSO4

Question 16: what element is found in the greatest number of substances?

Answer:

oxygen

Question 17: Citric acid

Answer:

C6H8O7

Question 18: Sucrose

Answer:

C12H12O11

Question 19: ascorbic acid

Answer:

C6H8O6

Question 20: calcium carbonate

Answer:

CaCo3

Question 21: 6 measuring tools?

Answer:

beaker, stop watch,triple beam balance, graduated cylinder, spring scale, meter stick

Question 22: what is a subscript?

Answer:

number that tells us how many elements there are

Question 23: which substance has the greatest number of elements?

Answer:

carbonate

Question 24: magnesium sulfate

Answer:

MgSO4

Question 25: what is an element?

Answer:

A fundamental substance that can not be broken down into simpler substances during chemical reactions .Question 26: what element is among the five most abundant elements in the sun, earth, ocean, atmosphere, and organisms?

Answer:

oxygen

Question 27: what is the periodic table of the elements?

Answer:

display of all elements showing how they relate.

Question 28: what does it mean when people say everything is made of stardust?

Answer:

elements are created with stars when a star explodes.