Science (Physical And Chemical Properties, Elements, Atoms And Ions)

Question 1

Name a compound element

Answer 1

Water, hydrogen and oxygen, and Carbon dioxide, Carbon and oxygen

Question 2

Name an element

Answer 2

Gold, Silver

Question 3

What is a Mechanical mixture?

Answer 3

A mechanical mixture is heterogeneous and all parts can be seen

Question 4

What is a Solution?

Answer 4

A solution is homogeneous and all parts cannot be seen

Question 5

Is this a chemical or physical property? A blanket is fluffy

Answer 5

Physical

Question 6

Briefly explain how the periodic table was created.

Answer 6

When the elements were discovered they had no kin of organization so Mendeleev put them in order by increasing atomic weight then creating the periodic table.

Question 7

What scientist was a big contributor and how was it organized and how has that changed?

Answer 7

Mendeleev was a great contributor to the periodic table being the first one to leave blank spaces for undiscovered elements. Before the periodic table was in order of atomic weight but now it’s in order of atomic number and elements are also grouped by similar chemical and physical properties.

Question 8

Where did the elements on the periodic table get their names from?

Answer 8

Some of the elements were named after famous or noteworthy people however a good amount of them are actually named after Latin words.

Question 9

What group number is the alkali metals and why are they unique?

Answer 9

Alkali metals are group number two and are the most reactive of the elements and are always combined with another element.

Question 10

What group does beryllium belong to? (Group number and family name)

Answer 10

Beryllium belongs to group two and is a part of the alkaline earth metals

Question 11

Give an example of three transition metals? What does it mean when I say that these metals are used as metals?

Answer 11

An example of three transition metals are iron, nickel, copper, cobalt, Titanium, etc. These metals are used in machinery, buildings, and jewelry

Question 12

On which side of the staircase are non metals and give 3 examples of them and their use.

Answer 12

The nonmetals are on the right side of the staircase case and some examples are, Phosphorus - Used in matches and growing bones and teeth
Chlorine - used for cleaning water and bleaching
Sulfur - used in fertilizers

Question 13

Get out a piece of paper and make the atom and ion for potassium

P - 19
E - 19
N - 39 - 19 = ?

Answer 13

(N = 20) +1 charge

Question 14

Make a atom and ion for calcium

P - 20
E - 20
N - 40 - 20 = ?

Answer 14

(N = 20) charge is +2