Science 3 and 4

Question 1

Elements in the same group have the same number of?

Accepted Answer

Valence Electrons

Question 2

How many molecules of water can be found here? 6H2O

Accepted Answer

6

Question 3

Which elements have metallic properties?

Accepted Answer

Metal & Metal = Mercury & Calcium

Question 4

What element is similar to Sodium (Na) and why? (hint: Sodium is in Group 1)

Accepted Answer

Potassium - Group 1

Question 5

What new substance was formed in this chemical equation?

Accepted Answer

Phosphorous Pentoxide

Question 6

a pale-yellow brittle solid and does not conduct electricity?

Accepted Answer

Sulfur - non metal

Question 7

Where are non metals located?

Accepted Answer

Right of the zig zag line

Question 8

What evidence of a chemical change is observed when rust forms on iron?

Accepted Answer

All of the above

Question 9

The arrow is pointing at?

Accepted Answer

Electron Cloud

Question 10

Which element has metallic properties?

Accepted Answer

Sodium

Question 11

Which of the following is an example of a physical change?

Accepted Answer

Shattering

Question 12

What does nitrogen contain?

Accepted Answer

7 protons, 7 electrons, and 7 electrons

Question 13

What subatomic particle is found in the electron cloud?

Accepted Answer

Electrons

Question 14

What similarities do elements from the same column of the periodic table have?

Accepted Answer

Similar Chemical Properties

Question 15

solid with a shiny metallic appearance. It is extremely brittle and can created superconductors

Accepted Answer

Metalliods

Question 16

Cannot be used as evidence for a chemical change?

Accepted Answer

Taste

Question 17

What elements are found in this sulfuric acid compound? H2SO4

Accepted Answer

Hydrogen, Sulfur, and Oxygen

Question 18

provides evidence that a chemical reaction occurs?

Accepted Answer

New colored gas is produced

Question 19

Whats the density? volume = 50cm3 and mass = 100 g

Accepted Answer

2 g/cm3

Question 20

What does oxygen contain?

Accepted Answer

8 protons, 8 electrons, and 8 neutrons

Question 21

Which is most reactive?

Accepted Answer

1 V.E. - Sodium - 11 Electrons

Question 22

Whats the density? Mass = 14.7 g and Volume = 2.2 cm3

Accepted Answer

6.7 g/cm3

Question 23

describe the location and charge of the electron in an atom?

Accepted Answer

Outside the Nucleus - Negative

Question 24

What do these two elements have in common? (CO2) and (CH4)

Accepted Answer

Carbon

Question 25

Which element has an atomic mass of 31?

Accepted Answer

Phosphorous

Question 26

which one completes the order (Nonmetal, metal, metal, and metalliod)

Accepted Answer

I, Ca, Rb, and As

Question 27

C6H12O6. How many atoms are present in one molecule of glucose?

Accepted Answer

6 + 12 + 6 = 24 atoms

Question 28

How many valence electrons does nitrogen contain?

Accepted Answer

5

Question 29

What can you tell me about an atoms nucleus?

Accepted Answer

It has mass and no charge

Question 30

Which of these give evidence of a chemical reaction?

Accepted Answer

Liquid solution changed color

Question 31

What's missing for Lithium? 3 protons, 3 electrons, and 4 neutrons

Accepted Answer

A Neutron is missing

Question 32

most likely caused a new substance to be mixed with water?

Accepted Answer

Creating Gas bubbles

Question 33

An atomic mass of 101 and an atomic number of 44, how many neutrons would it have?

Accepted Answer

101 - 44 = 57 Neutrons

Question 34

best describes an electron?

Accepted Answer

Negative - Weighs less than a proton

Question 35

If the reactants weigh both 28 g and 21.97 g, how much will the product weigh?

Accepted Answer

28 g + 21.97 g = 49.97 g

Science 3 and 4

Questions 35

Science 3 and 4

Questions 35