Bio Exam 1 study Qs

What is the smallest unit of matter?

• Molecule

• atom

• proton

• electron

The nucleus of an atom contains:

• Electrons only

• protons and neutrons

• neutrons and electrons

• protons and electrons

Tags

NGSS.HS-PS1-8

Isotopes of an element differ in their number of:

• protons

• electrons

• neutrons

• chemical bonds

What type of bond involves the sharing of electrons between atoms?

• ionic bond

• hydrogen bond

• covalent bond

• van der waals forces

A positively charged ion is called a(n):

• anion

• cation

• molecule

• isotope

Which type of bond forms between ions with opposite charges?

• covalent bond

• ionic bond

• hydrogen bond

• peptide bond

The Octet Rule states that atoms are most stable when they have how many electrons in their outermost shell?

• 2

• 6

• 8

• 10

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What kind of covalent bond occurs when electrons are shared unequally?

• non polar covalent bond

• ionic bond

• polar covalent bond

• hydrogen bond

What makes water a polar molecule?

• it is made of hydrogen and oxygen

• It has an uneven distribution of charge

• It contains ionic bonds

•  It has a neutral charge

The property that causes water molecules to stick to each other is called:

• adhesion

• cohesion

• condensation

• hydrophobia

Tags

NGSS.HS-ESS2-5