Describe why lithium and other Group 1 elements usually form positive ions, while fluorine and other Group 17 elements form negative ions.

Explain why Group $1$ elements tend to form $1+$ ions and Group $7$ elements tend to form $1-$ions.

In a chemistry lab you use a filter paper cone to filter a liquid. The diameter of the cone is 6.5 cm and its height is 6 cm. How much liquid will the cone hold when it is full?

Compare the number of valence electrons in an atom of oxygen, O, with the number of valence electrons in an atom of selenium, Se. Are oxygen and selenium in the same period or group?

Explain why some atoms gain or lose electrons to form ions.

Compare the number of valence electrons an oxygen, O, atom has with the number of valence electrons a selenium, Se, atom has. Are oxygen and selenium in the same period or group?

Tell which number is greater. 7. 1/2, 52%

Solve each equation. Check your solutions. $x=\sqrt{7 x-10}$

Explain why elements within a group have similar chemical properties.

Explain why elements in a group on the periodic table have similar chemical properties.

Draw the voltage-amplifier model and label its elements.

Assume that we choose primes p=17, q=23, and n=31. Compute s.

Graph the function. Describe the domain and range. Compare the graph to the graph of $y=\sqrt{x}.$ $y=-\sqrt{x+3}+4$

Why does continental crust stand higher on the mantle than oceanic crust?