1Q-PHYSCI

process in which a nucleus either combines or splits

combination of 2 nuclei

when a neutron splits

loss of alpha particle ( pos charge )

loss of beta particle .. loses neg charge + gains proton

releases energy

proton releases positron

used by unstable atoms para maging stable or wtv

The process in which, the nuclei of atoms are bombarded with alpha particles to create radioactive isotopes is called nuclear .

nucleosynthesis > stellar formation & evol > stellar explosion

physical theory that describes how the universe expanded from an initial state of high density and temperature
+ 75 % hydrogen & 25 % helium

heaviest element made by the big bang or whateva

Hydrogen

Helium

Carbon

the creation of new atomic nuclei, the centers of atoms that are made up of protons and neutrons

elements lighter than iron were formed

silicone, magnesium, neon, oxygen, helium, hydrogen, carbon, iron

helium and hydrogen

happens once the star runs out of fuel boooooooogsh

the colossal explosion of a star

slow process .. captures 1 neutron tas beta decay

rapid process .. captures 3 neutrons tas beta decay

believed that things are made out of the 4 elements ( wind, earth, fire, and water )

proposed that matter can be divided infinitely

everything is made out of tiny particles .. “ atomos “

greek for indivisible

" Law of definite proportions " .. all chemical compounds have the same mass

“ Law of multiple proportions “ .. elements have differ masses

periodic table

radioactivity

discovery of xray

discovered electrons and plum pudding model

charge of electrons => -1.6022 × 10^19 C

atoms are mostly empty space ( kasi gold foil experiment ) .. c idol discovered protons din

atomic model .. electrons move in concentric orbits around the nucleus

discovered neutrons

number of proton

proton + neutron

atoms that have the same atomic number but differ mass

involves electrosn that are outside the nucleus

pos ion

neg ion

the electrical attraction btwn nuclei and valence electrons

electrons found in the other shell

atoms need to gain or share to get 8 valence electrons

max 2 electrons

binds atoms ( metals only )

m + nm .. EN > 1.7

nm + nm

electrons are shared pero di equal .. 1.7 > EN > 0.4

electrons r shared equally .. EN < 0.4

m + m

nonmetals only .. can be found in implants n prosthetics

weakest bond .. halogens + non-polar

polar bond

strongest bond .. anything that has hydrogen

A final good or consumer good is a final product ready for sale that is used by the consumer to satisfy current wants or needs

accessible and commonly bought

uncommon

luxury / high brand

aggressive adv .. thangs u dont rly think of buying

substance in a product that has an effect on the body

A + B = AB

AB → A + B

AB + X → AX +B

AX + BY → AY + BX