All About Atoms!
Draw the shell model for Nitrogen
see if models are correct
What is a covalent bond?
When two atoms share electrons in order to fill their outer valence shells
What is an ionic bond?
When two atoms bond together by one atom stealing/taking (an) electron(s) from the other atom
Draw the covalent bond of water
H2O molecules! (see images)
What group does Oxygen belong to? What does that mean?
6, 6 valence electrons, is capable of making bonds
Draw the covalent bond of HCl (hydrochloric acid)
see images
What is a cation?
positively charged version of an atom (i.e. more protons than electrons)
The Oxygen atoms has a larger gravitational pull of electrons, therefore the electrons spend the majority of their time by the oxygen nucleus, giving it a slight negative charge. The opposite is true of the Hydrogen atoms.
Draw the Shell model for Flourine
see if answers are correct
Draw the covalent bond for Ammonia
NH3
How does NaCl bond together? Draw a diagram
When Na gives up an electron to Cl, it makes Na net positive, while Cl becomes net negative. This electrostatic charge bonds the two atoms together
Why/how did the dyed water travel up the celery?
The evaporating water from the stomata of a plant (transpiration), causes a "drawing" up of water from the roots. The water is able to travel against gravity because of cohesion/capillary action. The water travels through the xylem.
What group is Magnesium in on the periodic table? What does that mean?
2, it has 2 valence electrons
Draw the covalent bond for Methane
CH4
What kind of ion is a sulfur atom with 18 electrons?
How many elements are there?
118
Draw the covalent bond of Sulfur Dioxide (SO2)
see images (shares four electrons between each O and S
Draw and EXPLAIN the ionic bond (show the transfer of electrons) of the molecule Lithium Fluoride (LiF)
Should show that Lithium (Li) gives one electron to the Fluoride atom, and now the Li has a net positive charge, while Fl has a net negative charge, bonding them
How is water's polar qualities important for biological processes?
Many reasons! To name a few - Allows for capillary action in plants to aid in the water cycle/root uptake, allows for organisms to rely on surface tension for travel (jesus lizard), many other cool things!