Some Basic Concepts of Chemistry

Hydrogen bomb is based on the principle of  

• nuclear fission

• nuclear fusion

• natural radioactivity

• artificial radioactivity

_______ is an type of uniform composition of a mixture.

Check all the answers that are true for soft water.

• Soft water leaves residue on clothes and silverware

• Soft water produces a healthy lather with soap

• Soft water is clear

• Soft water sometimes has a slightly salty taste when you drink it

• Soft water is worse for the skin and hair than hard water

The image shows the periodic grid for SODIUM. How many neutrons are found in a potassium atom?

• 11

• 12

• 23

• Impossible to tell

The image shows the periodic grid for POTASSIUM. What is Potassium's atomic number?

• 19
• 39
• 20
• Impossible to tell

The image shows the periodic grid for SODIUM. What is Sodium's atomic number?

• 11

• 12

• 23

• Impossible to tell

What element will have the most similar physical and chemical properties to the element Bromine (Br)?

(click on the periodic table to expand it!)

• Fluorine (F)

• Carbon (C)

• Krypton (Kr)

• Selenium (Se)

what was the slides mainly explaining about?

• about chemistry

• about medicines

• about chemistry in medicines

• about physics

we need medicines in daily lifes for incase.

• True

• False

Which are the people who prescribe medicines

• pharmacists

• doctors

• none