Which Period 4 element has the most metallic properties?

(1) As (3) Ge

(2) Br (4) Sc

Which statement is not true about oxygen-17 and oxygen-18 (A) they have the same number of protons. (B) their atoms have an identical mass. (C) They are isotopes of oxygen. (D) they do not have the same mass number

What does CH4 stand for

How to calculate formula unit mass of calcium bicarbonate

What is the name for 3Na2SO4

Find the mass in grams of 4.48 liters of F2 gas at STP

In the synthesis reaction, the white powder produced is magnesium oxide (mgo, mm = 40.3 g/mol). how many moles of magnesium oxide were formed (number of moles = mass (g) / molar mass (g/mol)) ? choose the closest answer. a. 0.21 moles b. 0.

Which of the following is the most likeley example of an favorable mutation A. A mutation that makes a rabbit able run faster B. A mutation that changes the rabbit's fur to bright orange C. A mutation that changes the color of the rabbit's eyes D.

Which of these mole ratios is possible for this reaction? FeCl3 + 3NaOH → Fe (OH) 3 + 3NaCl 1:1 1:3 3:1 2:3

The chemical equation for reduction of phosphorite Ca3 (PO4) 2

Synthesize What environmental effects are shared by all fossil fuels?