Chemistry Y11

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

• atom

• molecule

• nucleus

• cell

What is the term for the force that holds two atoms together?

• physical bond

• magnetic bond

• emotional bond

• chemical bond

What are substances that release hydrogen ions when dissolved in water called?

• Acids

• Alkalis

• Salts

• Bases

In a chemical reaction, what are the substances on the left side of the equation called?

• Products

• Reactants

• Inhibitors

• Catalysts

Which group of elements in the periodic table is known as the alkali metals?

• Group 18

• Group 7

• Group 2

• Group 1

What is the term for the physical forms in which all matter naturally exists?

• molecular states

• forms of matter

• phases of matter

• states of matter

How many protons are present in the nucleus of a carbon atom?

• 7

• 8

• 5

• 6

What type of bond is formed when electrons are shared between atoms?

• Covalent bond

• Metallic bond

• Ionic bond

• Hydrogen bond

What is the pH value of a neutral substance?

• 5

• 7

• 10

• 8

Which element has the atomic number 26?

• Iron

• Silver

• Copper

• Gold