Химия

1.Central part of an atom?

• Core

• Electron

• Proton

2. Which gas is the lightest?

• Lithium

• Hydrogen

• Helium

3.What is the formula of quicklime?

• CaO

• CaC

• CaO2

4. What substances need to be mixed to make gunpowder?

• Saltpeter, nitrogen, carbon

• Hydrogen, sulfur, phosphorus

• Coal, saltpeter, sulfur

5. What is the name of an indivisible particle?

• Core

• Atom

• Molecule

6. Which water has a lower content of impurities: rain, sea, mineral?

• Nautical

• Rain

• Mineral

7.What item is used when bleaching laundry?

• Phosphorus

• Calcium

• Chlorine

What chemical element caused Napoleon's death?

• Arsenic

• Sulfur

• Carbon

The most abundant element in the earth's crust?

• Hydrogen

• Oxygen

• Ozone

What metal did the person process first?

• Ferrum

• Platinum

• Copper