Question

If an atom has 43 electrons, 56 neutrons, and 43 protons, what is its approximate atomic mass? What is the name of this element?
@Abhisar

Answer 1

the element is Es but what is Es?

Answer 2

Atomic Mass = Number of protons + Number of Neutrons

Answer 3

wait that's wrong

Answer 4

Atomic mass here = 56+43=99

Answer 5

id the atomic mass the same as the atomic number?

Answer 6

No, atomic number = No of protons

Answer 7

43 protons thus 43 is atomic number

Answer 8

So the element is technetium

Answer 9

Element is Technetium
take a look at periodic table

Answer 10

i'm looking at a periodic table it has number on the top and number on the bottom which number do i look at?
top number or bottom number?

Answer 11

@Kainui

Answer 12

the bottom one is atomic number

Answer 13

An electron almost has no mass so you can assume 0 atomic mass.

Proton's mass \(\approx\) neutron's mass \(\approx\) 1 atomic mass.

Answer 14

atomic mass = mass of 43 electrons + mass of 56 neutrons + mass of 43 protons
\(\approx\) 43*0 + 56*1 + 43*1

Answer 15

ok

Answer 16

all clear ?

Answer 17

i think so

Answer 18

i'll catch on as i keep going like i have with the physics