Chemistry Re-take

List the parts of the atom

• A nucleus with protons and neutrons, and an electron cloud

• A nucleus with protons and electrons and a neutron cloud

• A nucleus with electrons and neutrons and a proton cloud

What is the positive part of an atom found in the nucleus?

• Protons

• Neutrons

• Electrons

What is the neutral part of an atom found in the nucleus?

• Protons

• Neutrons

• Electrons

How do you find atomic mass?

• Add protons and neutrons

• Add electrons and neutrons

• Add protons and electrons

Why are elements reactive?

• Because they have more than 8 electrons in their outer energy level

• Because they have less than 8 electrons in their outer energy level

• Because they have exactly 8 electrons in their outer energy level

• Atoms are never reactive

Elements with the same number of protons but different number of neutrons are called

• Ionic bonds

• Ions

• Isotopes

• Isosoles

What type of bond holds oxygen to hydrogen in a water molecule?

• Coagulent bond

• Ionic bond

• Hydrogen bond

• Covalent bond

Sodium is combining with chlorine in the bond in the image. What type of bond is this?

• Ionic

• Covalent

• Hydrogen

• Metallic

Water attaches to another water molecule through which type of bond?

• Ionic bond
• Covalent bond
• Hydrogen bond
• Metallic bond

What solutions resists changes in pH to help maintain homeostasis?

• Sodium solutions

• Buffer solutions

• Ionic solutions

• Strongly acidic solutions