Q1 W1 Activity # 1 What's More, Complete Me (16 points) Supply the missing terms to complete the sentence. Choose the appropriate
word in the box below. The term can be used more than once.
Inertia, rest, velocity, speed, direction, unbalanced, bigger, mass
1. Newton's first law of motion is also known as the law of
will stay at
2. This law states that object at
and an
object motion will keep moving with constant
force acts on that object
unless an
3. Train engineers send early signals to clear off tracks because it would require
much
force to stop a moving train than a car moving at the same
speed.
_therefore, the harder it
4. The greater the
the greater the
is to change the state of motion of a body.
hat

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.

water and alcohols have similar properties because water molecules contain hydroxyl groups that can form hydrogen bonds with other water molecules and with alcohol molecules, and likewise alcohol molecules can form hydrogen bonds with other alcohol molecules as well as with water.