Chemical Interactions 1 and 2

Question 1

What elements are in NaCl? The last letter is a lowercase L!!

Accepted Answer

sodium, chlorine

Question 2

The iron in my cereal is the same as the iron in a fence.

Accepted Answer

True

Question 3

Some elements have exactly the same characteristics/properties as other elements

Accepted Answer

False

Question 4

How did Mendeleyev organize the periodic table?

Accepted Answer

From lightest to heaviest, By element properties, From simplest to most complex

Question 5

What are the three ways we identify substances?

Accepted Answer

common name, chemical name, chemical formula

Question 6

Which of the following is evidence of a chemical reaction?

Accepted Answer

color change, temperature change, new liquid or new solid formed, bubbling/fizzing

Question 7

What is the difference between Co and CO in a chemical formula?

Accepted Answer

Co is one element, CO is two elements, Co is cobalt, CO is carbon and oxygen

Question 8

How ready do you feel for the test tomorrow?

Accepted Answer

sort of ready, ready, NOT READY, This is going to be super easy

Question 9

What elements are in CO2?

Accepted Answer

carbon, oxygen

Question 10

True or False: All substances have unique chemical and physical properties.

Accepted Answer

True

Question 11

An _______ is a basic substance that cannot be broken down into simpler substances physically or chemically.

Accepted Answer

element

Question 12

A process by which the atoms of starting substances rearrange to form new substances

Accepted Answer

chemical reaction

Question 13

There are 90 naturally occurring elements on Earth.

Accepted Answer

True

Question 14

All matter is made of

Accepted Answer

elements

Question 15

What elements are in H2O?

Accepted Answer

hydrogen and oxygen

Question 16

Some substances ARE elements

Accepted Answer

True

Question 17

What elements are in CaCO3?

Accepted Answer

calcium, carbon, oxygen

Question 18

All things on earth are made from different combinations of elements.

Accepted Answer

True

Questions 18