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A MOLECULE is an electrically neutral group of TWO or more atoms held together by chemical bonds. Molecules are DISTINGUISHED from ions by their lack of electrical charge.

periodicity refers to trends or recurring variations in element properties with INCREASING ATOMIC number. Periodicity is caused by regular and PREDICTABLE variations in element atomic structure.Explanation:

tion:GROUP 8A — The Noble or Inert Gases. Group 8A (or VIIIA) of the PERIODIC table are the noble gases or inert gases: helium (He), neon (NE), argon (Ar), KRYPTON (Kr), xenon (XE), and radon (Rn). The name comes from the fact that these elements are virtually unreactive towards other elements or compounds.

orm chemical BONDS with other atoms when there's an electrostatic attraction between them. This attraction RESULTS from the PROPERTIES and CHARACTERISTICS of the atoms' outermost electrons, which are known as VALENCE electrons.________________________________

It is falseExplanation:HOPE it is HELPFUL for you..PLEASE mark me as brainlist answer

magnesiumExplanation:PLEASE FOLLOW me

In a physical CHANGE no new SUBSTANCE is formed.HOPE IT HELPS YOU .PLEASE MARK AS BRAINLIST.FOLLOW ME AS WELL.

matter EXPLANATION:matter matter have fixed SHAPE and VOLUME and the VERTICALS of fixed position

A YOUNG plant, especially ONE RAISED from a SEED and not from cutting

it will be OPTION D.

I will ANSWER your QUESTIONS

answer is 6.66 m/sExplanation:LET the total DISTANCE be 2x m. s1= 10m/s s2=20m/st1= d1/s1=x/10t2=d2/s2=x/20therefore, average speed =total distance /total timeAvg speed = D/t1+t2 =2x while DIVIDED by x/10+x/ 20S avg= 20/3 =6.66m/s

insspsmspkaapoams OK smspznsos. sznosmosmozmsosmsoExplanation:znznoznsoznozz NON KZ

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fibre is a thin thread of a natural or artificial substance, especially one that is USED to make cloth or rope. Fibre consists of the parts of PLANTS or seeds that your BODY cannot digest. Fibre is useful because it makes food pass QUICKLY through your body._______________________________Hope it helps. Mark brainliest ✌️

tion:No. Although TWO such ATOMS are essentially chemically identical (they will chemically react in the same way), they are not completely identical. ... The nucleus of an atom contains NEUTRONS and protons BONDED tightly together. The same chemical element can have a different number of neutrons and still be the same element

it's due to NETWORK PROBLEMS..I face it to try to reboot only ONE or two QUESTIONS will be available.then slowly all will COME

Conventional energy sources such as natural gas, oil, coal, or nuclear are finite but still hold the majority of the energy market. However, RENEWABLE energy sources like wind, FUEL CELLS, solar, biogas/biomass, tidal, GEOTHERMAL, etc.Explanation:HOPE it is helpful and correct

cationExplanation:I HOPE it will HELP.

1. P2. c3. C4. p5. p P as physical CHANGE and C as CHEMICAL change..

If you have a mixture of IRON and sulphur then these two ELEMENTS can be separated by using a magnet.Chaff is the outer cover of grains and hence is lighter than the grain particles.So they can be separated by the process of winnowingsugar and WATER is by BOILING or evaporationcream and milk by centrifugationcommon salt and sea water by distillationExplanation:plz mark me as BRAINLIEST

nal distillation is the separation of a MIXTURE into its component parts, or fractions. Chemical COMPOUNDS are separated by HEATING them to a temperature at which one or more fractions of the mixture will vaporize. It USES distillation to fractionate.

I THINK 28 but i am not sureExplanation:OK

the act or process of reproducing. the state of being reproduced. something made by reproducing an original; copy; duplicate: a photographic reproduction; a reproduction of a Roman vase. Explanation: the act or process of reproducing specifically : the process by which PLANTS and animals give RISE to offspring and which fundamentally consists of the segregation of a PORTION of the PARENTAL BODY by a sexual or an asexual process and its subsequent growth and differentiation into a new individual. Keep scrolling for more. HOPE IT HELPS YOU

d) John DaltonExplanation:If you like my ans plz HIT on the bell ICON and also hit on the heart for REGULAR updatesThankyou

It could not explain the stability of an atom because he thought that electrons while revolving in a circular path RELEASE ENERGY and the revolving electrons will lose energy and FINALLY fall into the nucleushope it helpsMark it as BRAINLIEST

metal carbonate → salt + water + carbon DIOXIDE When ACIDS react with carbonates, such as calcium carbonate (found in chalk, limestone and marble), a salt, water and carbon dioxide are made. The carbon dioxide CAUSES BUBBLING during the reaction, which is OBSERVED as fizzing.

tion:HEY MATE A.) IS THE RIGHT ANSWER .Both the ELEMENTS have same atomic MASS equal to 40 but different atomic numbers, i.e. argon has atomic number equal to 18 and calcium has atomic number equal to 20.HOPE IT HELPS YOU HOPE IT HELPS YOU 30 THANKS + FOLLOW =INBOX

d) GOLD is the purestI HOPE it will HELP youpls MARK this answer as brainliest

tion:OBSERVATION(1)MOST OF THE ALPHA PARTICLESP PASSED THROUGH THE GOLD FOIL WERE UNDEFLECTED.(2)A SMALL FRACTION OF ALPHA- PARTICLES WERE DEFLECTED BY SMALL ANGLES.(3)A 'VERY FEW ALPHA PARTICLES WERE BOUNCED BACK ( REFLECTED BY 180 DEGREES. CONCLUSION(1) MOST OF THE SPACE IN THE ATOM IS EMPTY.(2)A POSITIVE CHARGE IS NOT SPREAD THROUGH OUT THE ATOM ,AS THOMSON PREDICATED.(3) THE POSITIVE CHARGE IS CONCENTRATED IN A "VERY SMALL VOLUME" OF THE ATOM.THANK YOU,I HOPE IT'S HELPFUL TO YOU ✌️

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s often categorised by its composition. The most common glass is 'SODA glass', the combination of the three ELEMENTS silica, soda and limestone.please make my ANSWER brainliest

) Atom: The smallest part into which an element can be divided.(2) Isotope: Species having same atomic number but DIFFERENT mass number.(3) Atomic number: Number of electrons present in an atom which is equal to number of protons in a neutral atom.(4) Atomic mass number: Sum of the number of protons and NEUTRONS i.e, nucleons present in an atom.(5) Moderator in nuclear reactor: A material that slows the speed of neutrons.

(III) the chemical formulae of MAGNESIUM CHLORIDE is MGCL

tion:HEY MATE ..ACID RADICAL is SUBSTANCE left out without hydrogen which is generally a non metal or anion.See an EXAMPLE HCl if we separate this two we will get H+ and Cl- this Cl- is our acid radical.And basic radical is substance left out without a hydroxide ion which is generally a metal or cation.See an example NaOH if we disassociate them we will get Na+and OH- here Na+ is the basic radical .And salt is formed always of this basic and acidic radical.Ex - NaCl.HOPE IT HELPS YOU HOPE IT HELPS YOU 30 THANKS + FOLLOW =INBOX