Answer:
The correct answer is B. Isotopes of an element differ in the number of neutrons.
Explanation:
Isotopes are atoms of the same chemical element, and therefore with the same number of protons, in which the number of neutrons in the atom core differs. According to current models, an atom consists of an atomic nucleus surrounded by a cloud of electrons. The core consists of a number of protons and a number of neutrons. The number of protons determines the atomic number of the element and also the chemical properties. The number of neutrons determines, among other things, the stability of the nucleus and, together with the number of protons, the atomic mass. Two atoms with the same number of protons but a different number of neutrons are called two isotopes of the same element.
Explanation:
<em>
Homo sapiens</em> has dominated the world because of the features they evolved to adapt in the living conditions.
The physical characteristics that are developed by the<em> Homo sapiens</em> are:
1. Bipedalism- enabled the species to survive in grasslands and forests, to run after the prey to eat them.
2. Brain size- the increased size of the brain allowed the species to understand and analyse the world from a new perspective.
3. The use of hands as a tool to use the natural resources.
4. Sexual dimorphism- allowed the species to raise babies with more care.
Answer:
There are three main types of blood vessels
The arteries (red) carry oxygen and nutrients away from your heart, to your body's tissues. The veins (blue) take oxygen-poor blood back to the heart.
Explanation:
And hi have a nice day
Answer:
the universe
Explanation:
the big bang theory is thought to be the creation of the beginning of everything