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an element has electronic configuration 2 8 18 1 if its atomic weight is 63 then how many neutrons will be present in its nucleus1
ashleys car insurance costs her 115 per month how much does it cost her per yearmultiply 115 by 12 because there are 12 months in a year 115 times 12
define the ear canalthe other part of the outer ear is the ear canal the ear canal which conveys the sound to the eardrum is a rather tortuous canal
moisture from breathingmoisture coming from breathing might be shown by blowing on a cool mirror or into a cool glass or
moisture comes from other plantssecure a flower pot which has some bean or pea seedlings that are 10 or 15 cm in height cover the top of the pot with
moisture comes from home plantsplace a cellophane bag over a leaf of some house plant or garden plant and close the end about the stem with a rubber
moisture evaporates from soilfill a flower pot with moist soil and place it on a pair of scales either balances the pot of soil with weights or
weighing moisture againthe similar experiment can be done with a bath towel wet the towel and wring it out hang it on a coat hanger hang the coat
the number of electrons in the nucleus of c12 is1 6 2 12 30 43ans
each week jaime saves 25 how long will it take her to save 350divide 350 by 25 350 divide 25 14
the mop weighs lessput a floor mop in water wring it out and then balance it on a triangular file placed on the corner of a table be sure you have it
the hydride ions h- are isoelectronic with1 li 2 he
co2 is isostructural with1 sncl2 2
which expression below is equal to 5the correct order of operations must be used here pemdas tells you in which you should do the operations in the
which of the following is isoelectronic with carbon atom1 na 2 al3 3 o2-
which of the subsequent terms does not describe the number 9nine is not prime since it has 3 factors 1 3 and 9 prime numbers have only 2
define the term belbel the unit of measurement of sound is named after alexander graham bell bell was the inventor of the telephone but for some
the atomic number of an element is always equal to1atomic weight divided by 2 2number of neutrons in the nucleus 3weight of the
another way to show that air expands when heatedsnap a toy balloon over the neck of a small bottle and place the bottle in a pan of warm
find out the next number in the subsequent pattern320 160 80 40 each number is divided by 2 to find out the next number 40 divide 2 20 twenty is
air expands when heatedto show that air expands when heated fit an electric light bulb flask or a bottle with a single- whole stopper or cork which
define the term amplitudein simpler terms amplitude is the amount or relative value of a signal amplitude is measured in units of pressure eg
the ratio between the neutrons in c and si with respect to atomic masses 12 and 28 is1 2 3 2 3 2 3 3
define the nature of soundthis section is a recapitulation of what you have learnt in school you would recall that sound waves consist of the
explain the process of hearingthe ears as we all know are sense organs for hearing the ear consists of an external ear a middle ear and an internal