What is the volume of an object with the height of 2cm, a width of 4cm, a mass of 20g, and a length of 5cm? a. 160 cm^3
b. 40 cm^3
c. 800 cm^3
d. 11 cm^3

HeLp pLeaSe.

☆ionisation energy increases across a period from na -> ar☆ionisation energy decreases down a group from li -> fr☆ionic radius decreases across a period from na -> cl☆ionic radius increases down a groupfrom f -> ii hope it clarifies your doubts

The correct answer is:   bri hope this answer was ! : )

Is writing an option

Most elements have more than one naturally occurring isotope. as you learned previously, the atoms of those isotopes have the same atomic number (number of protons), making them belong to the same element, but they have different mass numbers (total number of protons and neutrons) giving them different atomic masses. so which mass is put on the periodic table for each element? is it the most common isotope’s mass? the heaviest mass? this activity will answer that question.