# Strengthen Your Atomic Number Skills with Plainmath's Expert Help and Resource Collection

Recent questions in Atomic Number
Paloma Houston 2023-03-24

## A pulley system can lift a load of 1200 N by an effort of 250 N. If the resistance due to the weight of movable parts and friction is 300 N.Find the total number of pulleys in the system. A) 2B) 4C) 6D) 8

Leon Bishop 2023-03-21

## "Estimate the average mass density of asodium atom assuming its size to be about 2.5.(Use the known values of Avogadro's number and sodium's atomic mass.). Compare it with the density of sodium in its crystallinephase: 970 kg ${m}^{-3}$. Are the two densities of the sameorder of magnitude? If so, why?"

zatynlpv 2023-03-13

## Atomic number refers to the number of present in an atom. neutrons electrons protons

vitefraise0s2i 2023-02-20

## What is the mass number of an atom which contains 28 protons, 28 electrons, and 34 neutrons? A) 28B) 56C) 62D) 90

Cindy Hubbard 2023-02-15

## The first allowed excited state of a hydrogen atom is 10.2 eV above its lowest energy (ground) state. To what temperature should hydrogen gas be raised so that inelastic collisions may excite an appreciable number of atoms to their first excited state. A. $17.88×{10}^{4}K$ B. $7.88×{10}^{4}K$C. $157.88×{10}^{4}K$D. $237.88×{10}^{4}K$

msvicezhs 2023-01-06

## Potassium exits in mainly two isotopic form,39k and 41k and their abundance in nature are 93% and 7%. What is the average atomic mass of potassium.

Keely Rivers 2023-01-02

## The positively charged atom is known as a _______

Ross Colon 2022-12-30

## Gram Atomic mass is just the atomic mass expressed in grams ...ie, atomic mass with gram as units. One more information about it gram atomic mass and gram atom are the same thing. Later a formula is given that: Gram atom = mass in grams / Atomic mass [RAM]. There are questions also that use this formula in which we have to find the number of "gram atoms " in a given mass of substance. So what is the real meaning of gram atom and the formula?

prydlyfrl7w 2022-12-21

## A Atom has a nucleus which is surrounded by electrons and protons. A cell in a leaf also has a nucleus, so the nucleus in the leaf also has electrons and protons surrounding it?

vecauj7 2022-12-20

## $g\left(x\right)={\int }_{0}^{{2}^{x}}\mathrm{sin}\left({t}^{2}\right)\phantom{\rule{thinmathspace}{0ex}}dt$, g'(0)=

Tordellilgn 2022-12-19

## The electronic configuration of Neon is?

godeloula5ko 2022-12-19

## The quark epoch is when ________ was/were created.Select one:A. everything in normal atomsB. protons and neutrons that still surviveC. all known matterD. the rapid inflation of the cosmosE. only dark energyWhat key event took place during the atomic epoch?Select one:A. Atoms in the universe collected to form stars and galaxies.B. The universe expanded and cooled enough to allow the first particles to appear.C. The neutrinos were created.D. The universe underwent a brief period of rapid expansion.E. The universe expanded and cooled enough for electrons to orbit protons.

2selz76t 2022-12-17

## If a proton is accelerated from rest through a potential difference of 1250V find its approximate velocity at the end of this process.

Blake Booker 2022-12-16

## What is the atomic mass of sodium?A. 22 uB. 23 uC. 11 uD. 20 u

nageljnovs6x 2022-12-13

## The number of protons in a lithium atom are A.3 B.2 C.4 D.8

privedbo48 2022-12-11

## Which subatomic particles have approximately the same mass?

Phoenix Wright 2022-12-07