science q (1 Viewer)

[dc1337]

http://www4.boardofstudies.nsw.edu....swer=D&courseID=5020&testQuestionID=145431935

I don't get why it's A.

 

[Kabuzo01]

http://www4.boardofstudies.nsw.edu.au/testResults.cfm?testID=7384206&testUUID=7B20968E-D58C-352C-D4E357CED89C2D3C&question_id=1185&question_num=6&correctAnswer=A&user_answer=D&courseID=5020&testQuestionID=145431935

I don't get why it's A.

Magnesium takes fast to burn where as iron takes longer.

 

[dc1337]

Is that because mg is an akaline earth metal?

 

[Kabuzo01]

Is that because mg is an akaline earth metal?

Think so =P

 

[dc1337]

But the question states that its two active metals. Iron is a transition metal, which is not really active.

 

[axlenatore]

Its based on the reactivity of the metal, with a more active metal been used up quicker, therefore it can be two highly activity metal (d) etc

 

[keenith]

http://www4.boardofstudies.nsw.edu.au/testResults.cfm?testID=7384206&testUUID=7B20968E-D58C-352C-D4E357CED89C2D3C&question_id=1185&question_num=6&correctAnswer=A&user_answer=D&courseID=5020&testQuestionID=145431935

I don't get why it's A.

its because magnesium is on the seond colomn meaning its highly reactive

where as iron is near the middle so its less reactive

all in all the outside s more reactive than those in the middles

 

[Kabuzo01]

Its based on the reactivity of the metal, with a more active metal been used up quicker, therefore it can be two highly activity metal (d) etc

Thats what I was trying to say =D But just couldnt word that properly lolz.

 

[keenith]

hehe -m-(^_^)-m-

 

[dc1337]

Its based on the reactivity of the metal, with a more active metal been used up quicker, therefore it can be two highly activity metal (d) etc

you mean "can't"

but how'd you define an "active metal" then?

 

[gcchick]

Sodium is in Group 1 (I think!), so is highly reactive, and Magnesium is in Group 2, also a very reactive metal.

The graph shows a lot of gas produced very quickly by both metals, hence the answer must be D.

 

[dc1337]

gcchick: The answer was actually A. You're in the same boat as me.

 

[gcchick]

you mean "can't"

but how'd you define an "active metal" then?

More active elements (including metals) have either a nearly empty or nearly full electron shell in the atom. For example, Sodium has one electron in its outer shell, and to become more stable, like Neon or any other noble gas, it tries to lose an electron.

A similar case occurs with chlorine, for example. It has seven electrons in its outer shell and so wants to gain an electron and become stable in its structure.

PM me if you need anymore clarification. =]

 

[keenith]

gcchick: The answer was actually A. You're in the same boat as me.

look at the coloumns (sp?) D isnt the answer because sodium should be on the right hand side not the left

 

[Kabuzo01]

More active elements (including metals) have either a nearly empty or nearly full electron shell in the atom. For example, Sodium has one electron in its outer shell, and to become more stable, like Neon or any other noble gas, it tries to lose an electron.

A similar case occurs with chlorine, for example. It has seven electrons in its outer shell and so wants to gain an electron and become stable in its structure.

PM me if you need anymore clarification. =]

That taught me something useful, thanks ^_^

 

[gcchick]

gcchick: The answer was actually A. You're in the same boat as me.

Crap, I misread it sorry.

The Board of Studies is WROOOOOONG!!

 

[gcchick]

That taught me something useful, thanks ^_^

No worries. HSC Chemistry comes in handy when helping out SC students. =]