Atomic Models Which Depict Electrons Element
Bohr Model
Electron Configuration
Lewis Dot Diagram
. As
'
Arsenic
1s 2s 2p 3s 3pas'3d"
ap'
1. Identify a unique feature of each of the three models of arsenie.
Bohr modelit consist the number of protons and neutrons in the centre of the page with circles
around contre representing number of electrons and energy
a
D: Electron configuration gives us the Electrons per shell
Lewis dot structure The lewis dot model have three valence electrons
2. Identify what each of the three models of arsenic have in common
what
Valence electrons are found in the highest energy level of an atom. How many valence electrons do you think
an atom of arsenic has? What makes you think that?
4. Electrons are sorted into energy levels. Under normal circumstances, how many energy levels do you think
contain electrons in an atom of arsenic? What makes you think that?

1. calculate the approximate enthalpy of the reaction in joules. estimate that 1.0 ml of vinegar has the same thermal mass as 1.0 ml of water. iqnore the thermal mass of th sodium bicarbonate. note: it takes about 4.2 joules () to change 1.0 gram (1.0ml) of water 1.0 c

Astudent made a graph plotting the progress of a reaction over time. the student forgot to label the y-axis of the graph. a graph is shown with two graph lines. one graph line starts at a higher position on the y axis and slopes downwards towards the right. the other graph line starts at a lower position on the y axis and slopes upwards towards the right. the two graph lines stop short of intersecting each other and continue as separate lines which gradually become straight and parallel to the x axis. a vertical line is shown at a point where the two graph lines finally became parallel to the x axis. this vertical line is labeled equilibrium. the title on the x axis is time and an arrow pointing towards the right is shown above time. the title on the y axis is left blank. what best explains the label that the student should use on the y-axis? amount, because as the amount of product decreases, the amount of reactant increases over time. reaction rate, because forward and backward reaction become equal at equilibrium. amount, because the amounts of reactants and products become constant after equilibrium is reached. reaction rate, as the rate of forward reaction increases and rate of backward reaction decreases over time.

Chen drew a diagram to compare the ways in which different organisms obtain nitrogen. which label belongs to the area marked z?