Third Periodical Test Science 8

Sta. Lucia High School Sta. Lucia Dinalupihan Bataan Third Periodical Test in Science 8 Date:

 Name: Sec:

Multiple Choice. Encircle the letter of the correct answer. 1. Atoms Atoms can e !iewe" !iewe" un"er un"er this this t#pe t#pe of microscop microscope. e. a. High$p High$powe owere" re" Light Light Micros Microscop copee  . Scanning %unneling %unneling Microscope Microscope c. Elec Electr tron on Mic Micro rosc scop opee ". None of of th these &. A particl particlee consisting consisting of two or more more atoms comine" comine" togeth together er in a specific arrangem arrangement ent a. Atoms Atoms . partic particle le c. Molecu Molecule le ". Matter  Matter  '. %he propert# propert# of matter matter which ha!e ha!e "efinite "efinite shapes shapes an" !olume !olume ecause ecause the properties properties are pac(e" pac(e" closel# together. a. Soli Soli" " . Li)u Li)ui" i" c. *as *as ". +las +lasma ma ,. -t refers refers to the amount amount of of material material contai containe" ne" in in an oect oect.. a. /e /eight ight . Mass c. 0olume ". none of these these . /hich /hich of of the the follow following ing is is N2% N2% matt matter3 er3 a. air . salt c. light

". smo(e

4. %hese are properties properties of matter matter e5cept e5cept6666 6666666. 666. a. Air Air . Soli Soli" " c. *as *as ". Li)u Li)ui" i" 7. %he process process # which which the molecul molecules es on the surfac surfacee of a li)ui" li)ui" change change into into gas a. E!aporati E!aporation on . Con"ensat Con"ensation ion c. Saturation Saturation ". 8iltratio 8iltration n 9. %he process process where a gas gas is change" change" into into a li)ui". li)ui". a. E!aporati E!aporation on . Con"ensat Con"ensation ion c. Saturation Saturation

". 8iltratio 8iltration n

. %his %his is the the organi organi;e" ;e" chart chart of of Elemen Elements. ts. a.  . c. ".

+eri +erio" o"ic ic %a %ale le of of Eleme Element ntss +erio"ic Chart of Elements +eri +erio" o"ic ic *ra *raph ph of of Elem Element entss None of these

1<. /hich of the following est "escries an atom3

a. protons and electrons electrons grouped together in a random pattern protons and electrons grouped together in an alternating pattern b. c. a core of protons and neutrons surrounded by electrons ". a core of electrons and neutrons surrounded by protons 11. /hich of the following is foun" farthest from the center of of an atom3 a. Nucleus . proton c. neutron ". electron 1&. /hich class of elements est con"ucts con"ucts electricit#3 electricit#3 a. Metals Metals . Nonmetals Nonmetals c. Metalloi"s Metalloi"s ". Nole =-nert> =-nert> *ases *ases 1'. /hat happens happens when a sample of water water turns to ice3 ice3 a. new new mol molec ecul ules es are are form forme" e"..  . the mass of the sample is increase". increase". c. the arra arrange ngemen mentt of the the molecu molecules les chan changes ges.. ". energ# energ# is aso asore re" " # the the mole molecul cules. es. 1,. /hat characteristic characteristic of caron =C> ma(es it essential essential to li!ing organisms3 a. Caron Caron forms forms cr#stal cr#stal struct structures ures un"er un"er certain certain con"i con"ition tions. s.  . Caron can e5ist as a soli"? soli"? li)ui"? or gas. c. Caron Caron on"s on"s in man# man# wa#s wa#s with with itself itself to form chains. chains. ". Caron Caron e5ist e5istss in ra"i ra"ioac oacti! ti!ee forms forms..

1. Al(ali metals? an" halogens are foun" respecti!el# in *roup66 an" 66 in the +erio"ic %ale. a. 1 an" 1 . & an" 1& c. 1 an" 17 ". 1 an" & 14. Atoms of metallic elements ten" to a. gain electrons an" form positi!e ions  . lose electrons an" form positi!e ions c. lose electrons an" form negati!e ions ". gain electrons an" form negati!e ions 17. / /hich of the following generall# applies to the nole gases3 a. high ioni;ation energ#? low electronegati!it#? high reacti!it#  . high ioni;ation energ#? high electronegati!it#? high reacti!it# c. low ioni;ation energ#? low electronegati!it#? low reacti!it# ". high ioni;ation energ#? low electronegati!it#? low reacti!it# 19. /hich are foun" in the nucleus of an atom3 a. electrons an" protons . neutrons an" protons

c. neutrons an" electrons

Use the Diagram below to answer items 19-22

1. %he part of an atom laele" B is a=an> a. proton . neutron c. electron

". none

&<. %he part of an atom laele" C is a=an> a. proton . neutron c. electron

". none

&1. %he part of an atom laele" A is a=an> a. proton . neutron c. electron

". none

&&. Scientists use this mo"el to stu"# atoms a. so large . so small c. eas# to see

". so !isile

&'$'< Categori;e the following elements as: a.  . c. ". &'. &,. &. &4.

@r#pton Bromine Boron -o"ine

Metalloi"s Nonmetals Halogens Nole *ases &7. Chlorine &9. 25#gen &. Helium '<. Sulfur  

". none of these

'1$' efer to the selection elow for items '1$' a.  . c. ". '1. '&. ''. ',. '.

Dmitri Men"elee! ohn Newlan"s ohann Doereiner  Henr# Mosele#

English chemist who propose" the Law of 2cta!es. 2rgani;e" the or"er of elements in the perio"ic tale accor"ing to their atomic numers. He forme" the tria"s of elements with similar properties. He "isco!ere" that the atomic numer closel# correspon"s to the nuclear charge of the atom. He "e!ise" the first perio"ic tale.

'4. Among the scientists who were responsile for the "e!elopment of the perio"ic tale are: -. Dmitri Men"elee! --. ohann Doereiner an" ---. ohn Newlan"s. Arrange their names in or"er of the histor# of the "e!elopment of the perio"ic tale. a. - ? --? --c. ---? -? - . --? ---? ". ---? --? '7. %he numer of protons in an atom represents the a. ioni;ation energ# . atomic numer c. electronegati!it#

". atomic mass

'9. /hich of the following is an al(ali metal3 a. Ba . Li c. + ". 8e '. /hat famil# of elements inclu"es fluorine an" chlorine3 a. nole gases . halogens c. al(ali metals ". none of these ,<. Elements that ha!e some properties of oth metals an" nonmetals are calle" a. metalloi"s . nole gases c. al(ali.metals ". none of these ,1$, +ro!i"e the s#mols of the following elements: ,1. ,&. ,'. ,,. ,.

Helium Sulfur  Silicon H#"rogen Chlorine

,4$<. %ell whether the following statement is: A. %rue

B. 8alse

C. Ma#e

D. -t "epen"s

 666666,4. Nole gases are generall# reacti!e.  666666,7. Al(ali metals are !er# reacti!e in their elemental form.  666666,9. Heat an" electricit# can easil# flow through metals .666666,. -t is impossile to pre"ict the properties of an# element  # its position in the perio"ic tale.  666666<. -n an atom? the numer of protons is e)ual to the numer of electrons.

+repare" #: MS !"#!!$ %&' M $&C!DA