10) Select 2 that apply. How does carbon dissolve into water? carbonic acids solid carbon charcoal gaseous carbon dioxide diamond form
True or False: Both elements and compounds are found on the periodic table. True False
4. Explain what happens to each of the following as the atomic masses of the elements in the periodic table increase: a. the number of protons __ b. the number of electrons __ c. the number of atoms in 1 mol of each element
A reaction between an acid and a base forms what products? Water Salt Salt and Water A covalent compound
What is the most stable ion formed by phosphorous? -1 +3 -3 -2
4. Explain why the lattice energy-the amount of energy necessary to break apart the lattice-of MgCl_(2) is greater than the lattice energy of NaCl. Coulomb's low which you may use in your answer, is F_(c)=k(q_(1)q_(2))/(r^2)
A Pure substance is made of one type of particles. Is B2 a pure substance? Explain Escriba su respuesta
What is the subunit of a polymer?
Which of the following is a heterogeneous mixture? Table Salt Oil and vinegar salad dressing Table sugar Baking soda
A student attempts to draw the electron configuration of an atom that has 7 electrons using orbital notation. Is the diagram correct or incorrect? square Which rule is violated? square
Since an element always has a different number of protons, the mass can indicate how many protons are in an isotope. TRUE FALSE
What is the value of the gas constant R, in units of $\frac {L-atm}{mol\cdot K}$ ? Report the value with at least three significant figures. Type answer: $\square $
Which equation is correctly balanced? $2K+Br2\rightarrow 2KBr$ $K+Br2\rightarrow 2KBr$ $2K+2Br2\rightarrow 2KBr$ $K+2Br2\rightarrow 2KBr$
Elements that form diatomic molecules include __
How many different types of subshells are there? 1(s) $5(s,p,d,f,z)$ $4(s,p,d,f)$ $3(s,p,d)$
Choose the formula for phosphate. a $PO_{4}^{3-}$ b $PO_{4}$ c $HPO_{4}^{2-}$
25. Write the Lewis structure for each element. (a) I (b) S (c) Ge (d) Ca
In art class students are mixing black and white paint to make gray paint. Sarah mixes 4 cups of black paint and 1 cup of white paint. Kayden mixes 5 cups of black paint and 2 cups of white paint. Use Sarah's and Kayden's percent of black paint to determine whose gray paint will be darker. Answer Attemptiout of 5 $Sarah's\quad percent\quad of\quad black\quad paint\quad (to\quad nearest\quad whole\quad number)=\square \% $ $Kayden's\quad percent\quad of\quad black\quad paint\quad (to\quad nearest\quad whole\quad number)=\square \% $ Sarah's gray paint will be darker. Kayden's gray paint will be darker. The two gray paints will be equally dark.
The electron configuration of nitrogen (N) is $1s^{2}2s^{2}2p^{3}$ th $1s^{2}2s^{2}2p^{4}$ $1s^{2}2s^{2}2p^{5}$ $1s^{2}2s^{2}2p^{6}$
How many valence electrons does lithium (Li) have available for bonding? 12 12 14
