Question

what is the mass number of an atom of potassium that has 20 neurons?

what is the mass number of an atom of potassium that has 20 neurons?

Science   Chemistry   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

For potassium, the atomic number,Z = 19

We know that Atomic number= no.of protons = 19

Given number of neutrons is 20

Atomic mass number= no. of protons + no. of neutrons

                               = 19 + 20

                               = 39

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Consider a mixture of potassium chloride and potassium nitrate that is 46.1% potassium by mass. What...
Consider a mixture of potassium chloride and potassium nitrate that is 46.1% potassium by mass. What is the percent KCl by mass of the original mixture?
3) a) for an atom with the atomic number 37 and mass number 85, provide the...
3) a) for an atom with the atomic number 37 and mass number 85, provide the number of electrons,protons, and neutrons b) which atom in each group has the highest first ionization energy? -. Na AL Ga - F CL Cs C) based on position in the periodic table, predict the most stable ion for each of the following atoms    -Sr     -P D) which atom or ion that is isoelectronic with AR: F-.   Cl-. Kr.   Na+ E) which...
Which branch of the ANS has a larger overall number of pre- and post-ganglionic neurons, allowing...
Which branch of the ANS has a larger overall number of pre- and post-ganglionic neurons, allowing for greater stimulation of effector organs, in a process known as mass activation?
How many protons are in an atom X that is an isotope of an atom Q...
How many protons are in an atom X that is an isotope of an atom Q that has 16 protons and 18 neutrons. what is the atomic number and the mass number of atom Q ,and for what isotope is the mass number less than double the atomic number
neutral carbon atom has 6 protons, 6 neturons and 6 electrons. What is the atomic mass...
neutral carbon atom has 6 protons, 6 neturons and 6 electrons. What is the atomic mass of Carbon?    1.   18     2.   12     3.   6.00127     4.   12.0107 10 points    QUESTION 17 Charles Darwin's theory of descent with modification was formulated from two basic observations, which of the following is one of those observations?    1.   A population usually can produce many more offspring than will can be supported     2.   All mutations lead to lower reproductive...
An atom of 49K has a mass of 48.965514 amu. Calculate the binding energy in MeV...
An atom of 49K has a mass of 48.965514 amu. Calculate the binding energy in MeV per atom. Use the masses: mass of 1H atom = 1.007825 amu mass of a neutron = 1.008665 amu 1 amu = 931.5 MeV
An aqueous solution of potassium iodide has a concentration of 0.231 molal. The percent by mass...
An aqueous solution of potassium iodide has a concentration of 0.231 molal. The percent by mass of potassium iodide in the solution is ________%.
What is the molecular geometry about a central atom which has the number of electron density...
What is the molecular geometry about a central atom which has the number of electron density regions and the number of attached atoms indicated
Three isotopes exist for potassium. Approximately 93 % of all potassium atoms have a mass of...
Three isotopes exist for potassium. Approximately 93 % of all potassium atoms have a mass of 39 u. 7 % of potassium atoms have a mass of 41 u. A very small proportion of potassium atoms have a mass of 40 u. What is the atomic mass of potassium? (a) 33.40 u (b) 39.14 u (c) 40.07 u (d) 40.86 u
An atom has a total of 18 electrons. a)What is the principal quantum number of the...
An atom has a total of 18 electrons. a)What is the principal quantum number of the outermost shell? In detail b)How many electrons does the outermost shell shell contain? In detail
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT