CHEMISTRY HIGH SCHOOL

Which of the following tells the computer what to do?a. Internet Explorer
b. Operating system
c. Random access memory
d. Monitor

Answers

Answer 1
Answer: The correct answer is B. The operating system tells the computer what to do. It is the software that support's the basic functions of a computer. This includes scheduling tasks, controlling peripherals and executing applications.
Answer 2
Answer:

Answer:

the answer is b and this how i know

Explanation:

i know that the answer is b because i just did this hope this helps tell me if its wrong it shouldnt be tho

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What group of elements least strongly attract electrons from other atoms in a compound

Answers

well there are two possibilities. The noble gases technically have the lowest electronegativitey, but often they are referred to as being non reactive and stable. In which case for elements that are reactive group 1 has the lowest electronegativitey and tends to lose its electron.

Based on its location on the periodic table, which metal is likely to be less reactive than both strontium and sodium?A. magnesium (Mg)
B. barium (Ba)
C. cesium (Cs)
D.rubidium (Rb)

Answers

Based on its location on the periodic table, the metal that is likely to be less reactive than both strontium and sodium is magnesium (Mg). The answer is letter A. The rest of the answers are highly reactive.

Answer: Option (A) is the correct answer.

Explanation:

When we move downwards in a group then size of the atom increases due to which there is less force of attraction between the nucleus and valence electrons of the atom.

Hence, the atom can easily loose electrons. As a result, reactivity of elements increases down the group.

But when we move across a period then there is decrease in reactivity of the atoms as size of atoms decreases due to which there is an increase in force of attraction between the nucleus and valence electrons.

Therefore, atoms are unable to lose electrons easily.

Hence, magnesium is less reactive than both sodium and strontium. Whereas except magnesium rest all options are more reactive than sodium and strontium.

Thus, we can conclude that magnesium is likely to be less reactive than both strontium and sodium.

The atomic number of an atom is alwaysequal to the number of its. (1) protons, only. (2) neutrons, only. (3) protons plus neutrons. (4) protons plus electrons

Answers

You are correct, the atomic number is always equal to the number of protons in the element. It is the relative atomic mass that is equal to the number of protons+neutrons. Electrons have no mass

11. Consider the elements neon, bromine, and phosphorus. Which has five electrons in its 4p sublevel?

Answers

Only bromine. You have to write electron configuration:
[Br]:1s^22s^22p^63s^23p^63d^(10)4s^24p^5

What particle is emitted from hydrogen-3 nucleaus when it undergoes radioactive decay?

Answers

Hydrogen-3 with scientific name Tritium often undergoes beta decay.

Identify the isotope that has atoms with 28 neutrons, 23 protons, and 23 electronsA. ^28 Ni
B. ^23 V
C. ^23 Mn
D. ^51 Sb
E. ^51 V

Answers

Answer:

E. ^51 V

Atomic number (number of protons in the nucleus): 23

Atomic symbol (on the periodic table of the elements): V

Atomic weight (average mass of the atom): 50.9415

Density: grams per cubic centimeter

Phase at room temperature: Solid

Melting point: 3,470 degrees Fahrenheit (1,910 degrees Celsius)

Boiling point: 6,165 F (3,407 C)

Number of isotopes (atoms of the same element with a different number of neutrons): 2; one stable V-51; one radioactive V-50

Most common isotopes: V-51 (99.75 percent natural abundance)
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