Science Homework Help - Tagged with element

How do you calculate the number of protons, neutrons and electrons in the atom of a certain element?

Posted by taylor-winston May 1, 2013 at 8:56 PM via iOS. 1 educator answer. »

What is the relationship betweeen the reactivity of an element and the likelihood of its existing as an uncombined element?

Posted by tamanim February 23, 2013 at 1:59 AM via web. 1 educator answer. »

A small piece of sodium is added to some water containing Universal Indicator solution. Describe what you would see happening.Sodium is a...

Posted by cornert07 May 23, 2012 at 1:49 PM via web. 1 educator answer. »

If the half-life of an element is 430 years & you had 2000 of this element, how long will it take to be stable?

Posted by chihuahuadog12 May 6, 2012 at 8:00 PM via web. 1 educator answer. »

How to find the period number of elements? Explain.

Posted by kumarvaibhav123 February 21, 2012 at 1:30 AM via web. 1 educator answer. »

How is CsOH (cesium hydroxide) reduced to Cs, its elemental form?Cs is the most electropositive/reactive metal on the Periodic Table. And Fr...

Posted by wq17 February 16, 2012 at 7:49 PM via web. 1 educator answer. »

a substance that cannot be broken down into other substances is what?  

Posted by melwilson November 2, 2011 at 9:21 AM via web. 1 educator answer. »

What are some very interesting facts about copper?I have to gather facts for chemistry project.

Posted by fourmetres October 21, 2010 at 5:03 AM via web. Be the first to answer. »

Fill in the blank: The number of protons in an atom of an element determines the atom's___, and the number of electrons determines ___of an...

Posted by summertime222 October 13, 2010 at 7:09 AM via web. Be the first to answer. »

What are 2 facts about the oxygen family?

Posted by hklhls March 24, 2010 at 6:04 AM via web. 1 educator answer. »