Exploring Chemistry Chapters 5-8

Question 1

Mendeleev believed an organized table of the elements would

Answer 1

help his students

Question 2

John Dalton’s atomic theory of matter was ___ accepted and soon became a foundation of modern chemistry.

Answer 2

quickly

Question 3

Davy discovered potassium by treating potash with

Answer 3

electricity from a strong battery

Question 4

Most alpha particles entered the gold foil and

Answer 4

pass straight through

Question 5

Dmitri Mendeleev set about organizing the table of elements by

Answer 5

writing information about the elements on note cards

Question 6

Fraunhofer saw the ___ while testing the quality of a prism.

Answer 6

lines in the spectrum

Question 7

According to Dalton, atoms of the same element are ___, including their weight.

Answer 7

identical in all their properties

Question 8

William Crookes did scientific experimentation

Answer 8

because he enjoyed it

Question 9

Henry Cavendish combined oxygen with nitrogen by using

Answer 9

an electric spark

Question 10

A radiometer

Answer 10

measures the strength of radiant energy

Question 11

About 1 alpha particle in 10,000

Answer 11

bounced out in the same direction it entered

Question 12

The first element discovered by the spectroscope was

Answer 12

cesium

Question 13

How many of Mendeleev’s missing elements have been found?

Answer 13

all 3

Question 14

The one who unwisely tasted and sniffed new chemicals was

Answer 14

Humphry Davy

Question 15

Dmitri Mendeleev was born in

Answer 15

Russia

Question 16

The name helium means from

Answer 16

the sun

Question 17

The three most important tools for making advances in chemistry were electricity, the periodic law, and the

Answer 17

spectroscope

Question 18

Dmitri Mendeleev organized his table of the elements by ___ and ___.

Answer 18

atomic weight, valance

Question 19

Current electricity is due to the motion of

Answer 19

electrons

Question 20

Was static electricity known or unknown to the ancient Greeks?

Answer 20

no

Question 21

An arc light generates light as electricity jumps across the gap between two ____ electrodes.

Answer 21

carbon

Question 22

To silence critics of his table, Mendeleev

Answer 22

predicted the properties of three missing elements

Question 23

The smallest objects that have the chemical properties of an element are

Answer 23

atoms

Question 24

The first college that Dmitri Mendeleev attended was one

Answer 24

to train teachers

Question 25

The noble gas family is also known as the

Answer 25

inert gases

Question 26

Alessandro Volta built the first

Answer 26

battery to produce electric current

Question 27

Robert Bunsen invented the ___.

Answer 27

Bunsen burner

Question 28

___ helps make light bulbs last longer.

Answer 28

Argon