The Last Worksheet

 

1)      What is the molecular mass (in amu) of one molecule of Al2SiO5?   __________

 

2)      What is the atomic mass of titanium?   __________

 

3)      What is the most common mass number of titanium?   __________

 

4)      How many neutrons in one atom of potassium-39?   __________

 

5)      How many protons in one atom of nitrogen?   __________

 

6)      How many electrons in one atom of iodine?   __________

 

7)      How many neutrons in one atom of xenon-131?   __________

 

8)      Which element has atomic number 83?   __________

 

9)      Which element has mass number 20?   __________

 

10)    How many protons in the element with atomic mass of 24.3 amu?   __________

 

11)    How many neutrons in one atom of copper-64?   __________

 

12)    How many electrons in the element with atomic number 54?   __________

 

13)    Which element has the mass number 80?   __________

 

14)    What is the mass of two molecules of CuFeS2?   __________

 

15)    What is the mass of one molecule of NaAlSi3O8?   __________

 

16)    What is the mass of the aluminum in one molecule of KAl2(AlSi3O10)(OH)2?   __________

 

17)    What is the mass of one molecule of Mg3Si2O5(OH)4?   __________

 

18)    If element A has 18 protons and 18 neutrons, and element B has 18 protons and 20 neutrons, are elements A and B different elements or isotopes?   __________

 

19)    If element A has 92 protons and 146 neutrons, and element B has 92 protons and 143 neutrons, are elements A and B different elements or isotopes?   __________

 

20)    If five neutrons are added to tin-115, what is the new element called?   __________

21)    If two protons are removed from lead, what is the new element called?   __________

 

22)    If two neutrons are removed from iron-58, what is its new atom called?   __________

 

23)    If two protons are added to iron, what is its new atomic number?   __________

 

24)    If two electrons are added to iron, what is its new atomic number?   __________

 

25)    If two protons are added to iron-56, what is its new atomic mass?   __________

 

26)    If two neutrons are added to iron-56, what is its new mass number?   __________

 

27)    If two electrons are added to iron, what is its new atomic mass?   __________

 

28)    An isotope of uranium has the symbol  How many protons are there?   __________

 

29)    Remove two neutrons from  What is the new symbol?   __________

 

30)    If two neutrons are added to  what is the new symbol?   __________

 

31)    Add two protons to  What is the new symbol?   __________

 

32)    If two electrons are added to  what is the new symbol?   __________

 

33)    Which particles are found inside the nucleus, and what are their charges?   ____________________

 

34)    Which particles are found outside the nucleus, and what are their charges?   ____________________

 

Consider the following four elements:

         A.  8 protons, 8 neutrons, 8 electrons

         B.  8 protons, 10 neutrons, 8 electrons

         C.  9 protons, 8 neutrons, 8 electrons

         D.  17 protons, 18 neutrons, 18 electrons

 

35)    Which element is a positive ion?   __________

 

36)    Which are isotopes of the same element?   __________

 

37)    Which element is a negative ion?   __________