Build An Atom

University:
University of Colorado Boulder
Course:
CHEM 1401 | Foundations of Chemistry Lab
Academic year:

2022
Views:

178

Pages:

4
Author:

Niko Short

Name Period Date https://phet.coiorado.edi/tysims/html/buildan- atom / latest/ build- an-atom_en.htrnl For use with HTML 5 (Chromebooks or Tablets ) Element . Hrotorw: Novtrone '. Electrons: EE ' IS. ft . IL ,k. t£.T, i.i uV - Build An Atom WebLab PhET tti.L S’ JjsiijjS; r» - t :-* < ;d Si.: *S Net Charge Choose Set up your options with check marks to show: orbits, element name, neutral/ion and stable/unstable IEI Mass Number Model: 0 0> O Otoud -..snow Part 1: Investigating Elements Names . KffElemenf Name Neutral/lon S? StabJe/Unstable Procedure: 1. Build an atom with 1 proton and 1 electron and fill in the chart below 2. Build an atom with 1 protons and 0 electrons and fill in the chart below 3. Build an atom with 1protons and 2 electrons and fill in the chart below 4. If the name of your element did not change, try adding different types of particles until your get a new element. Element Symbol H W W =! # Protons # Neutrons V l # Electrons Net Charge \ O O l 0 -ion, +ion or neutral O hi s +1 + S s -I 2 » Stable or Unstable , vV ^ ^ What particle must you change in order to change the name of the element ? >voWv ^ ;| \ l Questions: 1. in trials #1- 3, did changing the number of electrons change the name of the element? If not, what V\JLV CV'VCLYVT did it change ? pO ) Oo 2. ;; Mass Number Part 2: Investigating Mass ^ > Procedure: 1. Create neutral & stable hydrogen with a mass of 2. Fill in the chart below 2. Create neutral & stable helium with one neutron a mass of 3 . Fill in the chart below A 3. Add one neutron to the helium. Fill in the chart below 4. Create neutral & stable lithium with 3 neutrons. Fill in the chart below 5. Add one neutron to the lithium. Fill in the chart below 6. Vary the number of electrons and notice any change in mass ' Element # Protons #Neutron$ Symbol ^Electrons H He a He 3L Li O Li 3 o Net Charge a n 2 n 3 3 Q D ' 3 Stable or Unstable O i a. a -ion, +ion or neutral »0 Mass Number s a s 3 4- S T Ki Questions : 1. To go from Hydrogen (Trial #1) to Helium ( Trial #2 ) to Lithium (Trial # 4), what particle did you have to change ? Hint : Recall that in trials # 3 -Helium and #4- Lithium you still had 3 neutrons ! 2. When you changed this particle, what was the effect on the mass of the atom ? \ vYVXAS, > *- \ j V p v^-VlvA 1^ 3. When you increased the number of neutrons by one in Trials #3 & #5, what happens to the mass number ? i ^ 4. What is the likely mass of a single proton? neutron? \ 5. Does adding or removing extra electrons have any effect on the mass? Explain why or why not: CXMl VO D S VWXM mo Part 3: Investigating Charge 1. Before you begin - Define the scientific or mathematical meaning of: a. Ion b . Net c, Charge p 2. Complete the sentence using the terms above: When a neutral atom gains or loses electrons, it is called and it' s a (n) DOES NOT equal zero. C Procedure: . 1. Create neutral & stable hydrogen with a mass of 1 ( no neutrons) Fill in the chart below 2. Add one extra electron to the hydrogen. Fill in the chart below . 3 . Take away two electrons ( you now have 0 electrons) Fill in the chart below : Element Symbol #Protons # Neutrons # Electrons Net Charge -ion, +ion or neutral H o I H o a Q -i o o +\ \ H 4 Questions: 1. To create a neutral atom, what must be true about b . The electrons ? a. The protons ? Mass Number s +- 1 s I S l c. The net charge ? SOOTYNL ii Qih- Stable or Unstable 0 LUCJCNVV'-S ( 2. To create a (+) ion, what must be true about a. The protons? ro> 5\JL ' b. The electrons ? -Vv-'O-'W > c. The net charge? 4- it ifc " 3. To create a ( -) ion, what must be true about b. The electrons ? a . Itje protons ? {WV\JL - 10 o 10 O O -ion, +ion or neutral Stable or Unstable s r1 N UL Mass Number 2 Q. R 33 Questions: 1. What particle did you add or remove to change the atom from stable to unstable ? 2. Is the mass of the stable atom the same as the mass of the unstable atom ? Explain {j $ vTV' SNJiL VN . VYKSLS) OiO ,) " ^ W Vlx *' ^VO jTVv ^ . 3. iNUCLEUS^or ORBITS What part of the atom is affected by the addition or removal of neutrons? (Circle one ' i ! :I •• ii Choose Set up your options with check marks to show: orbits, element name, neutral/ion and stable/unstable The nuclear symbol is a short cut method of showing some of the things you've investigated so far. 1. 2. i I' . . 3 4 * 5. Element Protons; Nergtronv. Electrons; E ustasE * MEEK E . , , :> * & i ' Symbol S£h.. o : o * 0 Model: ii ) Orbits O ninud Build a Fluorine atom that is Show [ S? EIemenI Nam e neutral and stable ^ SNeutral/lon (fl 2r Stable/Unstable Play around with adding and removing neutrons and notice how the top left number changes Play around with adding and removing electrons and notice how the top right number changes. Add and remove protons and notice all the changes to the symbol On the sample below, explain what each number represents: , TAO SA -tir , 70 NloA- ; a ii. I: i If time allows: Choose and play each of the games £ Ct Ora^AJL. &

Related Documents

Recommended Documents

Description

Related Documents

Free up your schedule!

Take 5 seconds to unlock