FLC Chem 305 Lab Exercise #1
Measurements
Procedure:
In this experiment, the water, ice and salt water may be disposed down the drain.
Record all data in the spaces provided.
1. Mass
Be sure to record all of the digits off of the balance used in your mass measurement.
Each person take three different small everyday solid objects (coin, pen, key, etc) and weigh them on the
balance, recording the results below. Also, write down the mass of your partner's objects. Always be
sure to include the units next to your recordings in this case, g).
Your objects
Mass
Partner's objects
Mass
1)
2)
3)
II. Temperature

- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms

explanation: