Periodic Table
Atomic Structure
Chemical Reactions
Random
100

Sodium is considered as a ______.

a. Metal

b. Nonmetal

c. Semimetal

a. Metal

100

____ is referred to the last and most outer shell or electrons when drawn on a bohr diagram

Valence

100

Which pH value is the most acidic?

A) 1
B) 5
C) 7
D) 13

A) 1

100

Which element is the most abundant in the universe?

A) Oxygen
B) Carbon
C) Hydrogen
D) Nitrogen  

C) Hydrogen

200

Group 1 on the periodic table is known as the:

a) noble gases

b) halogens

c) alkali metals

d) alkaline earth metals

c) alkali metals

200

True or False

If an atom has a full shell of valence electrons, then this atom is considered to be stable

True

Atoms with a full valence are stable 

200

Which is the correct formula for a double replacement reaction:

1) AB → A + B

2) AB + CD → AD + BC

3) Hydrocarbon + oxygen → CO2 + H2O

4) Acid + Base → salt + H2O

2) AB + CD → AD + BC

200

Which element makes fireworks appear yellow?

A) Copper
B) Sodium
C) Barium
D) Strontium

B) Sodium

300

Is it IONIC or COVALENT?

Potassium bromide

Carbon tetrachloride  

Potassium bromide (IONIC)

Carbon tetrachloride (COVALENT)

300

How do you calculate the number of neutrons?

Subtract the atomic mass with the atomic number
300

In an EXOTHERMIC reaction the reactants have a ______ amount of energy, and the products have a ______ amount of energy 

Reactants are HIGH energy

Products are LOW energy

300

Which element is commonly used to fill party balloons?

A) Oxygen
B) Nitrogen
C) Carbon dioxide
D) Helium

D) Helium

400

is it IONIC or COVALENT?

PCl₃ 

CaCl₂

PCl₃ (COVALENT)

CaCl₂ (IONIC)

400

Which subatomic particles are only found in the nucleus?

protons and neutrons

400

This is considered as a _______ reaction

Mg +  AlCl3   →

Single replacement

400

Which element is the main component of diamonds?

A) Silicon
B) Carbon
C) Calcium
D) Hydrogen

B) Carbon

500

The number of protons of an atom are the same number of_____.

a) electrons

b) neutrons 

a) electrons

500

How many atoms for 

C ______

O ______

3 CO3

C: 3

O: 9

500

The law of conservation of mass states that_____.

The mass of the start of a reaction will be the same mass at the end of the reaction.

500

Which gas is responsible for the bubbles in bread dough?

A) Oxygen
B) Helium
C) Carbon dioxide
D) Nitrogen

C) Carbon dioxide

M
e
n
u