Write the formula for Chromium (m) bromide. Write the formula for Write the name
ID: 1057081 • Letter: W
Question
Write the formula for Chromium (m) bromide. Write the formula for Write the name for Znl_3 Na^+ & Ca^7 + are examples of (cations/anions) C-12 & C - 14 are examples of (ions/isotopes) To change Ca to Ca^2+ you need to (add/remove) (two electrons/two protons/two neutrons) Why do elements in the same family have similar chemical properties? Classify each of the following characteristics as metal, or nonmetal. (Right Side of periodic table, left side of periodic table. Usually gain electrons, become anions. Usually lose electrons, become cations, Ca, Li, Br. C, Cl, S) What is the Lewis dot structure for Bromine? What is shape of CCl_s? H_2O? Sodium-24 has a half-life of 15 hours. How much sodium-24 will remain in an 18 Og sample after 60 hours? Illustrate an alpha and beta particle. Balance the following nuclear equationsExplanation / Answer
11. Chromium(III) bromide (CrBr3)
12. N5Se9
13. ZnI2 Zinc iodide
14. cation because they have positive charge
15. Isotopes
Isotopes:
The atoms of an element with different mass number or atomic mass are called isotopes. They have same number of protons and electrons but different number of neutrons.
16.
To cahnge Ca to Ca2+ we remove 2 electrons
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