For the following processes that show the formation of ions, use the periodic table to indicate the number of electrons and protons present in both the ion and the neutral atom from which the ion is made.

a. $\text{Ca} \rightarrow \text{Ca}^{2+} + 2\text{e}^-$

a. If A has three elements and B has two elements, what is the greatest number of elements possible in (i) $A\cup B$? (ii) $A\cap B$? (iii) B - A? (iv) A - B?
b. If A has n elements and B has m elements, what is the greatest number of elements possible in (i) $A\cup B$? (ii) $A\cap B$? (iii) B - A? (iv) A - B?

Sample data have been collected, and the null hypothesis to be tested is $\mathrm{H}_0$ : "The sample was drawn from a normal population in which $\mu=130$." If the analysis is based on a categorization that includes 8 cells

a. How many degrees of freedom will be associated with the test?

Combine items from each column in order to write eight logical sentences. Remember that a + el = al.

$$\begin{matrix} \text{yo } & \quad & \text{la clase }\\ \text{tú} & \quad & \text{la oficina}\\ \text{Ud.} & \quad & \text{el parque}\\ \text{Felipe} & \text{ir + a} & \text{el restaurante}\\ \text{Elena} & \quad & \text{la fiesta}\\ \text{nosotros} & \quad & \text{la escuela}\\ \text{los estudiantes} & \quad & \text{el banco}\\ \text{los profesores} & \quad & \text{el hotel}\\ \end{matrix}$$

Use the periodic table to give the symbol of the element that meets the following conditions : a. has three electrons in the $n=4$ energy level b. has three $2 p$ electrons c. completes the $5 p$ sublevel d. has two electrons in the $4 d$ sublevel

For the following processes that show the formation of ions, fill in the number of electrons that must be lost or gained to complete the process.

$$\text{$\mathrm{N}+ \rule{1.25cm}{0.15 mm} \mathrm{e}^{-} \rightarrow\mathrm{N^{3-}}$ }$$

Combine items from each column to form logical sentences.

$$\begin{matrix} \text{a veces} & \text{yo} & \text{jugar a las cartas}\\ \text{muchas veces} & \text{tú} & \text{dibujar}\\ \text{una vez al día} & \text{mi amiga} & \text{jugar a los videojuegos}\\ \text{todos los dias} & \text{mi abuela} & \text{leer el periódico}\\ \text{(casi) nunca} & \text{nosotros} & \text{hacer aerobicos}\\ \text{(casi) siempre} & \text{mis amigos} & \text{jugar al ajedrez}\\ \end{matrix}$$

There are four naturally occurring isotopes of strontium: ${ }_{38}^{84}Sr$, ${ }_{38}^{86}Sr$, ${ }_{38}^{87}Sr$, and ${ }_{38}^{88}Sr$. Why don't any of the isotopes of strontium have the atomic mass of $87.62 amu$ listed on the periodic table?

Copper consists of two isotopes, ${ }_{29}^{63} \mathrm{Cu}$ and ${ }_{29}^{65} \mathrm{Cu}$. If the atomic mass for copper on the periodic table is $63.55$, are there more atoms of ${ }_{29}^{63} \mathrm{Cu}$ or ${ }_{29}^{65} \mathrm{Cu}$ in a sample of copper ?

Identify the critical points of the following functions. Then determine whether each critical point corresponds to a local maximum, local minimum, or saddle point. State when your analysis is inconclusive. Confirm your results using a graphing utility. f(x, y)=xy(2+x)(y-3)

Match the definition in Column B with the word in Column A. Write the letter of the correct definition on the answer line.

Column A

anomaly __________________

Column B

a. a departure from the normal or common order, form, or rule

b. deviating from what is normal; atypical

c. conspicuously unconventional; strikingly foreign

d. not consistent with what is logical, customary, or expected; not corresponding

e. being or seeming to be everywhere at the same time

f. odd, peculiar, or whimsical behavior

g. concerned with the ordinary, practical, or usual

h. prevalent in or peculiar to a particular locality or people; native

i. not habitual, customary, or common

j. a model of perfection or excellence

The speed of sound c in an ideal gas is known to be a function of the ratio of specific heats k, absolute temperature T, and specific ideal gas constant R gas. Showing all your work, use dimensional analysis to find the functional relationship between these parameters.

Combine items from each column in order to form logical sentences.

$$\begin{matrix} \text{la profesora} & \text{} & \text{tú saber la información}\\ \text{mi hermana} & \text{dudar} & \text{ellos tener la llave}\\ \text{los tios} & \text{no creer} & \text{que ella conocer a Marcos}\\ \text{mis amigos} & \text{no pensar} & \text{yo regresar tarde}\\ \text{yo} & \text{no estar seguro(a)} & \text{nosotros ir a la tienda}\\ \text{nosotros} & \text{} & \text{Ud. estar en casa}\\ \end{matrix}$$

Which elements are called transuranic elements?