Element, Mixture or Compound
Periodic Table 1
Periodic Table 2
Atomic Structure 1
Atomic Structure 2
100
Sodium [Na]

Element

100

Element Symbol for Potassium

K

100

Atomic Number for Neptunium

93

100

Number of protons in a Gallium atom

31

100
The number of valence electrons in a neutral Calcium atom

2 Valence Electrons

200

Nitrogen [N]

Element

200

Element Symbol for Californium

Cf
200

Atomic Mass of Silver

107.87

200
This atom has 29 protons in its nucleus.

Copper

200

The Most Common Isotope of Osmium

Os-190

300
Table Salt [NaCl]

Compound

300

Element symbol for Gold

Au

300

This element has an atomic number of 94.

Plutonium

300

This element is the only liquid transition metal.

Mercury

300

The number of neutrons in Mn-57

32 Neutrons

400

Chocolate Milk [Chocolate Syrup + Milk]

Mixture

400

Element Symbol for Antimony

Sb
400

The only liquid in the Halogen family

Bromine

400

Helium, Neon, Argon, Krypton, Xenon and Radon all belong to this family on the Periodic Table.

The Noble Gases Family

400

The number of NEUTRONS in the MOST COMMON ISOTOPE of Tin

69 Neutrons

500

Air [atmosphere]

Mixture

500

Element symbol for Lead

Pb

500

This element has an atomic mass of 238.03.

Uranium

500

This element is in Group 1 on the Periodic Table but is NOT a part of the Alkali Metals Family.

Hydrogen

500

This neutral atom has 6 valence electrons and the most common isotope of this atom has 76 neutrons.

Tellurium

M
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