Chemistry help?

Anonymous
timer Asked: Nov 12th, 2016

Question description

I've done the rest of my homework questions, but am not sure about these specific ones.. can anyone check them? Thanks in advance! :)


1. Which of the following pairs of elements would most likely combine to form a salt? 

O and F

Na and Al

I and F <---

K and I


2. Which of the following substances best conducts electricity in an aqueous solution?

MgCl2

CH3OH

NH3 <---

H2O2


3. In which of the following substances does sharing of electrons between 2 atoms occur?

Cr2O72-

KCl <---

Au

Ar 


4. On the basis of electronegativity, which of these pairs of elements is most likely to form monatomic ions?

O and F

Na and K

Cs and Rb

Ba and O <---


5. Electrostatic forces hold which of the following together? 

K+ and Br- in KBr <---

Oxygen and hydrogen atoms in OH-

He atoms in helium gas

Cu atoms and localized electrons in copper


6. Which of the following would have an electrostatic force of attraction between them? 

Na+ and Ar

Cs+ and Rb+

Cl- and O2-

K+ and P3- <---

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