An atom of a certain element has 21 protons, 21
electrons, and a mass number of 45. How many
...
![subject](/tpl/images/cats/mat.png)
Mathematics, 08.02.2021 06:50 marcedezebrown4736
An atom of a certain element has 21 protons, 21
electrons, and a mass number of 45. How many
neutrons are in this atom?
![ansver](/tpl/images/cats/User.png)
Answers: 3
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Another question on Mathematics
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 17:40
Divide. reduce the answer to lowest terms.5 2/3 ÷ 3 1/9
Answers: 3
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 18:20
Cot(90° − x) = 1 the value of x that satisfies this equation is °. a. 60 b. 135 c. 225 d. 315
Answers: 1
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 21:30
He ! a group of farmers planned to clean 80 acres of wheat per day to finish the work on schedule. right before the work started, they received a new piece of machinery that them clean 10 more acres per day than originally planned. as a result of increased productivity in the last day before the deadline they only had to clean 30 acres. how many acres of wheat did the group of farmers have to clean?
Answers: 1
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 21:30
Vanessa earns a base salary of $400.00 every week with an additional5% commission on everything she sells. vanessa sold $1650.00 worth of items last week.
Answers: 2
You know the right answer?
Questions
![question](/tpl/images/cats/mat.png)
Mathematics, 25.08.2021 22:10
![question](/tpl/images/cats/mat.png)
Mathematics, 25.08.2021 22:10
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 25.08.2021 22:10
![question](/tpl/images/cats/mat.png)
Mathematics, 25.08.2021 22:10
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 25.08.2021 22:10
![question](/tpl/images/cats/mat.png)
Mathematics, 25.08.2021 22:10
![question](/tpl/images/cats/fizika.png)
Physics, 25.08.2021 22:10
![question](/tpl/images/cats/fizika.png)
Physics, 25.08.2021 22:10
![question](/tpl/images/cats/mat.png)
Mathematics, 25.08.2021 22:10
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/geografiya.png)
![question](/tpl/images/cats/fizika.png)
Physics, 25.08.2021 22:10
![question](/tpl/images/cats/health.png)
![question](/tpl/images/cats/ap.png)
Advanced Placement (AP), 25.08.2021 22:10
![question](/tpl/images/cats/geografiya.png)
![question](/tpl/images/cats/biologiya.png)
Biology, 25.08.2021 22:10