Physics

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Atoms can be photographed by A) electron beams. B) scanning electron microscopes. C) both of ... Started by kfurse	1 Replies 119 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 70 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 104 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 195 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 79 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 138 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 120 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 82 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 98 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 178 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 251 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 130 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 141 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 83 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 193 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 180 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 140 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 110 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 49 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 69 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 87 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 107 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 104 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 91 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 66 Views	Jul 29, 2018 by Bison