Biochemistry 2023 Day 1

A nitrogen atom has 7 protons. If I add one more proton, is it still nitrogen?

• No, it is an isotope

• Yes, it is an isotope

• No, it is a different element

• Yes, it just has a different charge

If I have two atoms of oxygen, but one is heavier (has a different atomic mass), this means they are

• Isotopes of each other

• Ions of each other

• This is not possible, you can't change the weights without changing the element

An atom that has a charge is called a(n)

• ion

• isotope

• element

• molecule

Drag the correct term to its spot on the diagram

a

b

Atoms

Molecules

Match the following terms related to the atom

• Proton

• Negative charge, found in cloud

• Atomic Mass

• Positive charge, found in nucleus
• Neutron

• No charge, found in nucleus

• Atomic Number

• Equivalent to the weight of the nucleus

• Electron

• Equivalent to the number of protons

Mark which of the following are ELEMENTS

Answer explanation

A little bit of a trick question - some elements are ONLY found in pairs - oxygen is one of them. If the molecule is two of the same element, it is still called an element (hydrogen H2, nitrogen N2 are other examples of this)

In a chemical reaction, which make or break ​ (a)   , the ​ (b)   are the starting molecules, while the ​ (c)   are the ending molecules

• reactants
• products
• chemical bonds

Match the following types of bonds

• Electrostatic interaction

• Occur when electrons are unequally shared between two atoms

• Nonpolar Covalent bond

• When a slightly positive hydrogen interacts with a slightly negative O, N, F atom

• Ionic bond

• Occur when electrons are equally shared between atoms

• Hydrogen bond

• Results when electrons are transferred from one atom to another

• Polar Covalent bond

• The term for positive charges being attracted to negative charges

Match the following

• Polar covalent bond

• 
• Hydrogen bond

• 
• Ionic bond

• 
• Nonpolar covalent bond

• 

The pull of a nucleus inward on its electrons is called _____

• chemical bond

• electronegativity

• an isotope

• the atomic mass