6.941 tells you the nucleon number (total number of protons and neutrons in the nucleus of an atom)
3 tells you the proton number( number of protons in the nucleus of an atom.)
When drawing this you must know the number of protons , electrons, and neutrons of that element. Well in this question, everything’s been given. No. of protons = 3
No. Of electrons = 3 *REMEMBER, NUMBER OF PROTONS AND ELECTRONS ARE EQUAL WHEN THE ELEMENT IS IN ITS ATOMIC FORM.
No. Of neutrons= 4 neutrons. When rounding 6.941, it is 7. Then simply subtract 7-3 to get 4.
Now time to draw this. First you must know the number of electron shells does lithium has. Since lithium is in period 2, it has 2 electron shells.
Then, you must know what is the valence electron of Li. It is 1, since it is a group I element/alkali metal.
Also remember the structure. Electron are surrounding the nucleus of the atom on electron shells while the nucleus is in the center of the atom. Nucleus contains the protons and neutrons. REMEMBER THE FIRST SHELL SHOULD CONTAIN ONLY 2 ELECTRONS WHILE THE SECOND SHELL WITH 8 ELECTRONS AND GO ON.
Hope this helps and if I’m correct can you add me to the brainliest?
I believe the answer would be:
C. Glycogen; starch
Answer:
The correct order is:
- Electrical signal travels toward the heart
.
- Signal received by the nodes in the atrium
.
- The atria contract
.
- Signal received by the atrioventricular node.
- Signal transferred to the ventricles
.
- The ventricles contract
.
Explanation:
The steps are:
- <em>Signal transferred to the ventricles
.</em>
- <em>The atria contract
.</em>
- <em>Electrical signal travels toward the heart
.</em>
- <em>The ventricles contract
.</em>
- <em>Signal received by the nodes in the atrium
.</em>
- <em>Signal received by the atrioventricular node.</em>
The question refers to the heart's physiological electrical conduction mechanism, which goes from the atrial node to the atrioventricular node, passes to the bundle of His and its branches, and then extends through the Purkinje fiber system, all so that coordinated events occur that allow blood flow within this organ.
The correct order of steps, linked to the activity of the heart and blood flow are:
- <u>Electrical signal travels towards the heart</u>: the autonomic nervous system conducts the nerve impulse to the heart.
- <u>Signal received by the nodes in the atrium</u>: the atrial node, a structure that is located on the right atrium, receives the nerve impulse and is responsible for transmitting it to the ventricular atrial node.
- <u>The atria contract:</u> the contraction of this structure drives the blood to the ventricles, promoting the simultaneous opening of the atrioventricular valves.
- <u>Signal received by the atrioventricular node</u>: a node located in the interventricular septum is responsible for the distribution of the impulse to the His-Purkinje system.
- <u>Signal transferred to the ventricle</u>s: the nerve signal passes to the His bundle, its branches and then the Purkinje fibers found in both ventricles.
- <u>The ventricles contract</u>: ventricular contraction promotes the emptying of your cavities, passing blood from the right ventricle to the lungs, and from the left ventricle to the general circulation. At this time the atrioventricular valves are closed and the sigmoid valves are opened, to allow anterograde blood flow.
Learn more:
Movement of oxygenated blood leaving the heart brainly.com/question/2375870