Physics

Replies / Views	Last post
Atoms can be photographed by A) electron beams. B) scanning electron microscopes. C) both of ... Started by kfurse	1 Replies 72 Views	Jul 29, 2018 by Tabitha_2016
Atoms heavier than helium were at one time manufactured by A) photosynthesis. B) thermonuclear ... Started by BRWH	1 Replies 43 Views	Jul 29, 2018 by canderson530
An element is distinct because of its number of A) protons. B) neutrons. C) electrons. D) the ... Started by abc	3 Replies 58 Views	Jul 29, 2018 by sylvia
Atomic number refers to the number of A) protons in the nucleus. B) neutrons in the nucleus. C) ... Started by theo	1 Replies 121 Views	Jul 29, 2018 by vickybb89
Which is the smallest particle? A) molecule B) atom C) proton D) neutron E) ... Started by Haya94	1 Replies 40 Views	Jul 29, 2018 by frogdreck123456
Which of the following elements has the most mass? A) hydrogen B) iron C) lead D) uranium E) ... Started by Pineappleeh	1 Replies 103 Views	Jul 29, 2018 by Shshxj
Which of these atoms has the greatest number of electrons? A) helium B) carbon C) iron D) gold ... Started by Chelseaamend	3 Replies 73 Views	Jul 29, 2018 by Hikerman221
Which of these atoms has the greatest amount of electrical charge in its nucleus? A) helium B) ... Started by genevieve1028	1 Replies 43 Views	Jul 29, 2018 by ebonylittles
The chemical properties of matter are due mostly to their A) protons. B) electrons. C) ... Started by mcmcdaniel	1 Replies 58 Views	Jul 29, 2018 by cloudre37
Two protons added to an oxygen nucleus produce A) heavy oxygen. B) fluorine. C) neon. D) ... Started by OSWALD	1 Replies 113 Views	Jul 29, 2018 by Amiracle
Compared to the mass of a hydrogen atom, the mass of an oxygen atom is A) 8 times as great. B) ... Started by SO00	3 Replies 168 Views	Jul 29, 2018 by KKcool
A pair of helium nuclei fused together produces A) helium isotope. B) lithium. C) beryllium. ... Started by EY67	1 Replies 91 Views	Jul 29, 2018 by atrochim
If a nitrogen atom and a slightly heavier oxygen atom have equal kinetic energies, which has the ... Started by yoooooman	1 Replies 95 Views	Jul 29, 2018 by momo1250
How many protons should be added to the nuclei of oxygen atoms so the resulting gas will glow red ... Started by armygirl	1 Replies 51 Views	Jul 29, 2018 by taylorsonier
A uranium atom is 238 times as massive as a hydrogen atom. Compared with the diameter of a hydrogen ... Started by WWatsford	3 Replies 145 Views	Jul 29, 2018 by ntsoane kedibone
Compared to the average size of a hydrogen atom, the average size of a helium atom is A) larger. ... Started by jjjetplane	1 Replies 142 Views	Jul 29, 2018 by princessflame2016
Compared to the diameter of a zirconium atom (A = 40), the diameter of a mercury atom (A = is ... Started by Charlie	1 Replies 115 Views	Jul 29, 2018 by Jossy
An atomic mass unit (amu) is 1/12 the mass of A) an electron. B) a proton. C) a hydrogen atom. ... Started by mia	1 Replies 80 Views	Jul 29, 2018 by kiamars2010
Which contains more atoms? A) 1 kg of hydrogen B) 1 kg of iron C) both contain the ... Started by APUS57	3 Replies 37 Views	Jul 29, 2018 by mcarey591
What is the molecular mass of a water molecule? A) 10 amu B) 12 amu C) 15 amu D) 18 amu E) ... Started by strangeaffliction	1 Replies 58 Views	Jul 29, 2018 by jaymee143
A nucleon has a mass of about A) 1 amu. B) 1 atomic mass unit. C) both are the same. D) none ... Started by penza	1 Replies 59 Views	Jul 29, 2018 by taylorsonier
Which of the following is NOT a compound? A) air B) ammonia C) water D) salt E) all are ... Started by meagbuch	1 Replies 60 Views	Jul 29, 2018 by 1_Step_At_ATime
What is the total number of individual atoms in a water molecule? A) one B) two C) three D) ... Started by P68T	3 Replies 55 Views	Jul 29, 2018 by Laurenleakan
When carbon and oxygen atoms combine, energy is A) absorbed by the reaction. B) released by the ... Started by darbym82	1 Replies 61 Views	Jul 29, 2018 by dyrone
How many different kinds of elements are in a water molecule? A) one B) two C) three D) four ... Started by waynest	1 Replies 57 Views	Jul 29, 2018 by Bison