Show:
What's the matter ?
It's all about bonding
Acids and Bases. Oh my !!
The atom, my friend !!
Properties of water
100
Anything that has mass and takes up space
What is matter
100
Two or more different atoms bonded together
What is compound
100
A compound that reacts easily with other substances and turns litmus paper blue.
What is a base
100
The middle of an atom
What is a nucleus
100
An uneven distribution of electrons between the H and O molecules
What is a polar water molecule
200
Chemical substance composed of the same type of atom
What is element
200
Transfer of electrons
What is ionic bonding
200
At what pH would soap be found ? - Image 5
What is D
200
If an atom contains 9 protons and 11 neutrons, its atomic number is
What is 9
200
An attraction between molecules of the same substance
What is cohesion
300
What is/are the number(s) of atoms for the following: a)6H2O, b)3SO4
What is a) H=12 O=6 b) S=3 O=12
300
Bonds between the atoms within the same water molecule?
What is a covalent bond
300
A substance that is being dissolved
What is a solute
300
What are the atomic number and mass number of this element? - Image 1
Mass number: 35 Atomic number: 17
300
The attraction between the H atom on one water molecule and the O atom on another
What is hydrogen bonding
400
This ion forms when an atom gains electrons?
What is anion
400
When an atom shares 4 electrons with another atom (HINT: 2 pairs of electrons)
What is a double bond
400
Each step on the pH scale increases or decreases by this factor
What is 10
400
What makes each isotope different? - Image 2
What is the number of neutrons in the nucleus
400
Observe the image and explain what is happening ? HINT: There are 2 types of bonds, how is each different ? Think of charges too. - Image 6, 7
Covalent bonds are the bonds between the atoms within the same water molecule. Hydrogen bonds are the bonds between two water molecules. The water molecule is polar because there are slightly different charges at each end. Because of this polarity, the oxygen end of the molecule would repel negative atoms like itself, while attracting positive atoms, like hydrogen. This positive and negative attraction system helps water molecules stick together,
500
What is the overall charge of an atom ? Why?
What is neutral charge. Because the number of protons will always equal the number of electrons, therefore they will cancel out.
500
What type of bond is in the image? Explain how this happens. - Image 8 Hint: ions
What is ionic bonding ? The sodium atoms each lose an electron, forming cations (Na+), and the chlorine atoms each gain an electron to form anions (Cl−).
500
The human stomach produces hydrochloric acid, commonly known as "stomach acid." It is generated in the digestion process, but when a person eats something requiring the stomach to work overtime in digesting it, like a pizza it may result in "heartburn." When this happens, people often take antacids, which contain a base such as aluminum hydroxide. Explain how the base relieves the symptoms for heart burn ?
pH is the concentration of H ions in the solution. As the acid gets neutralized, more of the H ions combine with OH from the base and form water lowering the H concentration and pH. The anion from the acid reacts with the cation from the base to give a salt.
500
Which one of the following is the correct Lewis dot structure for PH3?- Image 3,4
What is E
500
Why does ice float ? How is this important to marine life ?
What is: ice floats because it is less dense than liquid water. The molecules form an ordered crystal through hydrogen bonding that spaces the molecules farther apart than when they were in a liquid.The heavier water displaces the lighter ice, so ice floats to the top. One consequence of this is that lakes and rivers freeze from top to bottom, allowing fish to survive even when the surface of a lake has frozen over. If ice sank, the water would be displaced to the top and exposed to the colder temperature, forcing rivers and lakes to fill with ice and freeze solid.