Science Archives - Page 2 of 10 - Questions And Answer

Science Questions

Que1.
Why are all measurements uncertain?
View Answer Posted Posted: 07-10-2023
Que2.
When writing numbers using scientific notation, numbers greater than one have exponents and numbers less than one have exponents.
View Answer Posted Posted: 07-10-2023
Que3.
How can you tell whether a compound should be named an acid?
View Answer Posted Posted: 07-10-2023
Que4.
When writing a formula from a chemical name, how can you tell how many of each element or polyatomic ion to put in the formula?
View Answer Posted Posted: 07-10-2023
Que5.
Once you have identified that a compound contains a polyatomic ion, how is naming it different from naming a binary compound?
View Answer Posted Posted: 07-10-2023
Que6.
Why is a system for naming compounds necessary?
View Answer Posted Posted: 07-10-2023
Que7.
Give the formulas for the compounds that contain the following pairs of ions. a. A l 3 and C l c. C a2 and S2 b. K and O2 d. S r2 and F
View Answer Posted Posted: 07-10-2023
Que8.
Which elements are gases at 25 °C? Write their formulas.
View Answer Posted Posted: 07-10-2023
Que9.
Write the symbol for each of the following. a. The magnesium atom that has 12 neutrons
View Answer Posted Posted: 07-10-2023
Que10.
What caused Rutherford to propose a revised model of the atom? How is the Rutherford model different from the previous models?
View Answer Posted Posted: 07-10-2023

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