Chemical properties can also be used to identify a substance. They can only be recognized when substances react. This means the substance(s) undergo a change in...
What is composition
200
The isotope carbon-14 has __ neutrons
What is 8
300
What element has 12 less protons than Ba
What is Ru
300
An element that has 2 valence electrons and is in period 3...
What is Mg
300
Density is a property that explains the relationship between _____ and _____
What is mass/volume
300
An isotope of manganese has 25 protons and 30 neutrons. What is the mass number?
What is 55
400
This element has 5 valence electrons and is 2 periods below Cl
What is Sb
400
An element that is in period 4 and has 5 valence electrons...
What is As
400
When a substance changes from a liquid to a gaseous state this is the...
What is boiling point
400
An element chlorine-36 with a 2+ charge has how many electrons?
What is 15
500
This family of elements are nonreactive and found in the gas phase
What are noble gases
500
What element in group 18 has 2 valence electrons?
What is He
500
A neutral atom becomes a positive ion when it...
What is looses an electron
500
An element carbon-14 with a 3+ charge has how many electrons?