Names of all group members:

What is an Atom?

Fill in the table.

12e 13e 13eNumber of protons Co ~ CDNumber of neutrons CD 1 1Number of electrons (0 <0 1

What do all carbon atoms and ions have in common?

What do all hydrogen atoms and ions have in common?

\ ~~ j ~\ ~\- ert ~~\-"@I\.

What is the significance of the atomic number, Z, above each atomic symbol in the periodic table?

What do all nickel (Ni) atoms have in common?

Answer the following in terms of numbers of protons, neutrons, and electrons.

a) Why does the notation 13ehave a negative sign in the upper right hand corner?

\ mofe ~\~\wl\\\n~\I\t- ~ ~\i)\unS (\L\~b) What feature distinguishes a neutral atom from an ion?

Mo\1(../ Lees 'E\u,~S t'r-Av-- ~\trnC;.'i.{)1)S 'no...\I~ 0.. c\\~'\\'flC\C\\~,:f~e.

c) Provide an expression for calculating the charge on an ion .

. C::: (no.."'\~. :C'-=--w ~~~SC -=. -:r.. - rt: e::*'£\~(.-n-OY)S

What structural feature is different in isotopes of a particular element?

How is the mass number, A (left hand superscript next to the atomic symbol), determined?

Show that the mass number and charge given for 1602-and 23Na+ are correct.

"2-: 8- e-~

~ \~-,\1""-"

,\ fi2 =23

/6e

Names of all group members:

What is an Atom?

Fill in the table.

12e Be BeNumber of protons I & 0-V ~ - --

Number of neutrons ! -r -;!C {

Number of electrons b 6 nI

What do all carbon atoms and ions have in common?-\he-tr\. \'le..vC \(,e ~VV\e..:tl of' y?£b torr." ~ _l9(( ,,~

~) ~

What do all hydrogen atoms and ions have in common?'1\re_ ~J c.l{ h(;.v( 1 ff()h)\r\

What is the significance of the atomic number, Z, above each atomic symbol In the periodic table?l{.U';:, ~ ift· Vl£lVVll?er o-f pr~'l"~ IV, h"-,~ 1'1,..•.c...k.-v.-;.

What do all nickel (Ni) atoms have in common?

\~eu ~~\ hCvJl!.- ·U-L ~f"Y\c tL uP f>rcbn-s-

Answer the following in terms of numbers of protons, neutrons, and electrons.

a) Why does the notation Be have a negative sign in the upper right hand comer?\)e£AA....";,<.- \ \-- ~) it il)~'\.hve C~f~ ~.V1J ':y..:Y1e...J eJ ~~

b) What feature distinguishes a neutral atom from an ion?}:t ~ DtllA't)€-

c) Provide an expression for calculating the charge on an ion.

What structural feature is different in isotopes of a particular element?p~ ti- of froh'J) , ~l- d{~t- tt- oF- {le:!..-t,tro<1S

How is the mass number, A (left hand superscript next to the atomic symbol), determined?.- ~ \-t\t-t: 4Yl Y'" ([\ VlUA ~ <:> ~ fro~ s

Names of all group mem ers:

What is an Atom?

Fill in the table.

12e Be BeNumber of protons c; r, (bNumber of neutrons l ':f 7-Number of electrons r: li:? 1-'

What do all carbon atoms and ions have in common?

- Sam-e YlVtvJ ber DF Pfott)'l S

What do all hydrogen atoms and ions have in common?-QIl Vla~ . el~ct(CYf5 ,d neVt1"01'ts

What is the significance of the atomic number, Z, above each atomic symbol in the periodic table"?

-1n.e I1umber ct prOttN1 S

What do all nickel (Ni) atoms have in common?

- l~ rUNtn7erckprotuv'l~

Answer the following in terms of numbers of protons, neutrons, and electrons.

a) Why does the notation Be have a negative sign in the upper right hand corner?

- \t'S a¥\ a~n ~ SyttlbOilel5 tfUA,t- it ~Ofhtd llt1 .e/-eonrtV'\

b) What feature distinguishes a neutral atom from an ion?

- 1nf cnor~.

c) Provide an expression for calculating the charge on an ion.

Cl1O~ e =- .••. ~~ prlity) <':> - -#- t?r tl-elTV16

What structural feature is different in isotopes of a particular element?_ Dftf!teYl.r y\1NVl~ Of Y\€tltttvl-:S ~ oi "" .«-JS.

How is the mass number, A (left hand superscript next to the atomic symbol), determined?

- 1\1\e S~W1 or fro ten S I" ~ (1tfCVl~ .

Show that the mass number and charge given for 1602- and 23Na+ are correct.

I~02- '2.~NO\.-

(Co;gr-"~\I) 2..3:l\p1'12n,),3 r -I(} ;- z.. UP -10 ~