katı maddelerin kütlelerini eşit kollu terazi nin kefesindeki ağırlıklara göre belirleyiniz. altlarına yazınız fen​

Zoe is investigating the composition of substance a, an unknown substance. using chemical processes, she analyzes substance a and determines it is composed of sodium, oxygen, and hydrogen atoms in a ratio of 1 : 1 : 1. what is substance a? a. a compound b. an element c. a heterogeneous mixture d. a homogeneous mixture

Which atom or ion is the largest? a. k b. k+ c. ca d. ca2+ e. li

Is 343 in the sequence -5, -2, 1, 4, 7