E1 Ch2

Question 1

Smallest basic unit of matter

Answer 1

Atom

Question 2

Formed when an atom gains or loses electrons

Answer 2

Ion

Question 3

Atoms in molecules share pairs of electrons when they make

Answer 3

Covalent bonds

Question 4

Which of the following solutions has the highest H in concentration?

-ph of 1
- ph of 4
- ph of 7
-ph of 10

Answer 4

Ph of 1

Question 5

Substances are changed into diff substances when bonds break and form during

Answer 5

Chemical reactions

Question 6

Nucleus of an atom contains

Answer 6

protons and neutrons

Question 7

Fundamental diff between covalent and ionic bonding

Answer 7

In covalent bond partners share a pair of electrons, in ionic bond one partner captures an electron from the other

Question 8

Solution with ph of 4 is

Answer 8

Weakly acidic

Question 9

Water molecules stick to other water molecules bc

Answer 9

Hydrogen bonds form between the hydrogen atom of one water molecule and the oxygen atom of other water molecules

Question 10

Ionic bonding

Answer 10

Attraction between 2 oppositely charged ions ( Na+ Cl- )

Question 11

Polar covalent bonds

Answer 11

Atoms shared unequally,atoms with diff electronegativity shares electrons

Question 12

Hydrogen bonds

Answer 12

Weak bond between slightly positive and slightly negative atoms

Question 13

Found in nucleus of an atom

Answer 13

Protons
Neutrons
Positrons

Question 14

When proton number and electron number are unequal the atom or molecule

Answer 14

Is an ion