Patterns of chemistry

What is the smallest unit of an element that still retains the properties of that element?

• nucleus

• cell

• atom

• molecule

Which subatomic particle has a positive charge?

• Electron

• Neutron

• Proton

• Photon

In which group of the periodic table are the alkali metals found?

• Group 7

• Period 3

• Transition metals

• Group 1

What is the atomic number of carbon?

• 7

• 8

• 5

• 6

What is the symbol for the element with atomic number 1?

• He

• H

• O

• Li

What is the name of the process where a solid changes directly into a gas?

• sublimation

• melting

• condensation

• evaporation

What is the pH value of a neutral solution?

• 7

• 5

• 10

• 8

Which state of matter has a definite shape and volume?

• liquid

• gas

• solid

• plasma

What is the chemical formula for hydrochloric acid?

• H2O2

• HOCl

• HCl

• H2Cl

What is the name of the group 17 elements in the periodic table?

• Transition metals

• Alkali metals

• Halogens

• Noble gases