Gallium, a metal, has a freezing point near room temperature so it can be melted
ID: 999579 • Letter: G
Question
Gallium, a metal, has a freezing point near room temperature so it can be melted by holding it in your hands. If gallium's melting point is 302.8 K, what is that temperature in degree C? 39.8 degree C 0.0 degree C 29.8 degree C 575.8 degree C 302.8 degree C What volume is occupied by 14.3 g of mercury? Density = 13.6 g/mL. 37.2 mL 1.05 mL 0.236 mL 193 mL 4.82 mL Which element has the largest atomic radius? P Si Al S Cl The number of electrons present in the s orbitals in the outermost electron shell of the alkaline earth (Group IIA) metal is one three four five two What mass of silver nitrate, AgNO_3, is required to prepare 800.g of 3.50% solution of AgNO_3? 24.6g 26.7 g 27.0g 28.0 g 25.5 g What is the total number of electrons in the fifth energy level (n = 5). 32 18 25 16 50 Which of the following is the electron configuration of F-? 1s^2 1p^6 2s^2p^6 The phosphorus pentachloride molecule is nonpolar and contains to lone (unshared) electron pairs on the phosphorus atom. What are all of the possible Cl-P-Cl bond angles? 109.5 degree 90 degree, 120 degree, and 180 degree 90 degree and 180 degree 120 degree 180 degree The element whose symbol is Ca is cadmium. californium. carbon. calcium. none of these.Explanation / Answer
as you have specificallly asked for question 21, i would just answer that.
alkaline earth metals have 2 valenve electron. so option e is correct
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