Draw the Lewis structure for each molecule. $\mathrm{PH}_{3}$

Draw the Lewis structure for each molecule. $\mathrm{SiH}_{4}$

How to draw a Lewis structure of PH${_2^-}$?

Draw the Lewis structures for each of the following ions or molecules. Identify those in which the octet rule is not obeyed; state which atom in each compound does not follow the octet rule; and state, for those atoms, how many electrons surround these atoms:

$$PH_3$$

Write the Lewis structure for each molecule. a. $NF_3$ b. $HBr$ c. $SBr_2$, d $CCl_4$

Ethylene, C2H4, and tetrafluoroethylene, C2F4, are used to make the polymers polyethylene and polytetrafluoroethylene (Teflon), respectively.

Draw the Lewis structures for C2H4 and C2F4, and give the ideal H-C-H and F-C-F bond anges.

Draw the Lewis structure for each molecule. $\mathrm{CCl}_{4}$

h2s lewis structure

Name each of the binary covalent compounds listed below. $CCl_4$

Name each of the binary covalent compounds. $\mathrm{NF}_3$

Name each of the binary covalent compounds. $\mathrm{CO}_{2}$

What is required for an atom to expand its valence shell? Which of the following atoms can expand its valence shell: F, S, H, Al, Se, Cl?

Identify the type of conic. Find the center, vertices, and foci of the conic, and sketch its graph.

$$\dfrac{(x+3)^2}{18}-\dfrac{(y-5)^2}{28}=1$$

A point object is 10 cm away from a plane mirror, and the eye of an observer (with pupil diameter 5.0 mm) is 20 cm away. Assuming the eye and the object to be on the same line perpendicular to the mirror surface, find the area of the mirror used in observing the reflection of the point.