So a camera can zoom in and out and the human eye has peripheral vision
Answer: Sustainable living
Explanation: It is a lifestyle by which an individual uses natural resources only as much as is necessary, which means in limited quantities, and thus reduces the general enormous exploitation of these resources. In this way, the needs of the individual are met and resources are put to use for generations to come. It also refers to personal resources as well as Earth resources in general.
It is obvious from today's point of view that if food was produced only as much as needed, it would mean not throwing away food, everyone, both those who could otherwise afford food and those who are now starving, would be fed up.
With the reduction of production not only of food but also of other necessities, that is, with production to meet the needs and not beyond, there would be less pollution and less emission of harmful hags and greenhouse effect.
Answer:
Average atomic mass = 14.0067 amu.
Explanation:
Given data:
Abundance of 1st isotope = 99.63%
Atomic mass of 1st isotope = 14.003 amu
Abundance of 2nd isotope = 0.37%
Atomic mass of 2nd isotope = 15.000 amu
Solution:
Average atomic mass = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass) / 100
Average atomic mass = (99.63×14.003)+(0.37×15.000) /100
Average atomic mass = 1395.119 + 5.55 / 100
Average atomic mass = 1400.67 / 100
Average atomic mass = 14.0067 amu.
Answer:-
Metalloids
Explanation: -
Metalloids are elements with properties that are somewhat in between those that of metals and non metals. They have generally 4 or 5 electrons in their valence shell for up to the 4th period to be called a metalloid. From the fifth period 6 valence electrons can make an element metalloid.
From the sixth even 7 valence electrons can make an element metalloid
The electronic configuration of Germanium is
2,8,18, 4
So it is a metalloid.
The electronic configuration of tellurium,
2,8,18, 18, 6
So it is a metalloid.
The electronic configuration of Arsenic
2,8,18, 5
So it is a metalloid.
The electronic configuration of astatine
2,8,18, 32, 18, 7
So it is a metalloid.
Answer
Dmitri Mendeleev Explanation:The modern periodic tables is credited primarily to the russian chemist Dmitri Mendeleev. Mendeleev's table is based on the periodic law, which states that when elements are arranged in order of increasing mass, their properties recur periodically.
