A it is 1 billion because I looked it up
Answer:
Explanation:
J. J. Thomson Electrons are scattered within the atom.
J.J. Thomson carried out experiment on the discharge tube in 1897 which led to the discovery of electrons as a subatomic particle. During this time, the whole atom was thought to be made of only electrons.
John Dalton Atoms are the smallest unit of an element.
John Dalton in 1808 proposed that atoms are the smallest indivisible particles of an element.
Ernest Rutherford Protons are at the center of an atom.
In 1911, Ernest Rutherford performed experiments using gold foil. He discovered that an atom is made up of a massive center made up of positively charged particles called protons.
Niels Bohr Electrons are in orbital levels.
Bohr in 1913 suggested that electrons are in specific spherical orbits around the central nucleus.
Name the three types of neurons classified according to the direction in which the impulse is being transmitted. Define or explain each of them. Sensory neurons, also called afferent neurons, transmit impulses to the spinal cord and brain from all areas of the body.
<span><span>The
answer to that question is Iodine. Iodine is considered to be a chemical element
that has an atomic number of 53 and
has the atomic weight of 126.90447</span>. Iodine has the symbol of the letter I and is an element classified as a non-metal and its phase is categorized as a solid material. Usage
for Iodine and its compounds lies mostly in the nutritional and industrial
aspect. </span>
Marla has four cards labeled Q, R, X, and Z to represent four different elements: nitrogen, calcium, germanium, and bromine, and Q and Z are both nonmetals. Option C is correct regarding the elements.
<h3>What is the atomic constitution?</h3>
The atom contains electrons, protons, and neutrons, and the electrons revolve outside on their orbits while the proton and neutron are present in the center. The proton and electron numbers are the same in the neutral atom, so from the proton number, the atomic number of the element can be determined. Here, Q (nitrogen) and Z (bromine) are nonmetals, the R (calcium) is a metal, and the X (germanium) is a metalloid.
Hence, Option C is correct regarding the elements, as Q and Z are both nonmetals.
Learn more about the atomic constitution here.
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