Give the number of valence electrons for O. A) 0 B) 1 C) 2 D) 3 E) 4

Answers

Answer 1
Answer:

Answer:

C) 2

Explanation:

it has an electronic configuration of 2.6

therefore, in order to gain a stable outer shell, 2 more electrons will be needed which is the valence electron

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Which statements accurately describe atoms?

Answers

According to the statements made, the atoms were given names in the fifth century. All the others are untrue. Atoms can be divided, hence the previous claim that they are the smallest unit is also untrue. Atom splitting produces enormous amounts of energy, which is a topic of study in nuclear physics or other sciences. Additionally, because light particles are made up of atoms, they cannot be observed under a normal microscope.

What is an Atom?

An atom is a unit of matter that specifically characterizes a chemical element. One or more negatively charged electrons surround the core nucleus of an atom, which is made up of all of them. One or more protons and neutrons, which are comparatively heavy particles, can be found in the positively charged nucleus.

The fundamental units of matter are called atoms. Atoms make up anything that occupies space and has mass.

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The answers from the statements provided is that the atoms were named in the fifth century. The others are false. Atoms can be divided as such the last statement of atom being the smallest unit is also false, splitting of atoms generates huge amount of energy studied in nuclear physics or sciences. It also cannot be seen through standard microscope as light particle itself is made up of atoms. 


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Whose touch turned all to gold, Aurum or Midas? a) Aurum b) Midas c) Both d) Neither

Answers

Answer:Midas

Explanation: As midas was a king who was blessed by dionysis the god of wine and festival , and since in returns for caring for a satyr he found in his backyard who was a follower of dionysis the go blessed him with the gold touch. thus answer is midas

A baseball on a T-ball stand has no momentum until it is hit with a bat. When Tyler swings the bat, it has a momentum of 12 kg m/s. After the bat hits the ball, the ball has a momentum of 8 kg m/s. What is the momentum of the bat AFTER it hits the ball

Answers

Answer:

4 kg m/s

Explanation:

According to the Law of Conservation of Momentum, the total momentum must be the same before and after a collision. The total momentum before the bat hit the ball was 12 kg m/s. After the collision, the ball has a momentum of 8 kg m/s. Therefore, the bat must have a momentum of 4 kg m/s.

positive direction : bat swing

total momentum before = after
12(bat) + 0(ball) = 8(ball) + bat-after

bat-after is positive then direction is the same

An electron traveling with a speed of 2.50 × 10^6 meters per second collides with a photonhaving a frequency of 1.00 × 10^16 hertz. After the collision, the photon has 3.18 × 10^−18 joule of
energy.
Calculate the original kinetic energy of the electron. [Show all work, including the equation and
substitution with units.]

Answers

Answer;

K.E =2.85 × 10⁻¹⁸ Joules.

Explanation;

  • Kinetic energy is the energy that keeps an object or a body in motion.
  • Kinetic energy is given by the formula 1/2 mv², where m is the mass of the particle or body in motion, and v is the velocity.

K.E = 1/2 mv²

  Mass of an electron = 9.11 × 10⁻³¹ Kg, velocity of the electron =2.5×10⁶ m/s

Thus, K.E = 1/2 (9.11 × 10⁻³¹ Kg) (2.5 × 10⁶ m/s)²

                 = 2.85 × 10⁻¹⁸ Joules.

The original kinetic energy of this electron is equal to 2.85 × 10⁻¹⁸ Joules.

Given the following data:

  • Velocity of an electron =2.5 × 10⁶ m/s.
  • Frequency = 1.00 × 10¹⁶ hertz.
  • Photon energy = 3.18 × 10⁻¹⁸ Joules.

Scientific data:

  • Mass of an electron = 9.11 × 10⁻³¹ Kg.

How to calculate kinetic energy?

Mathematically, kinetic energy can be calculated by using this formula:

K.E = 1/2 × mv²

Where:

  • K.E is the kinetic energy.
  • M is the mass.
  • V is the velocity.

Substituting the given parameters into the formula, we have;

K.E = 1/2 × 9.11 × 10⁻³¹ × (2.5 × 10⁶ m/s)²

K.E = 2.85 × 10⁻¹⁸ Joules.

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What is the function of a capacitor?

Answers

Answer:

What is a capacitor?

Capacitor, a electronic component to hold charges, represented by the letter C. It composes of two metal electrodes between a layer of insulating dielectric. When a voltage is applied between the two metal electrodes, the charge is stored on the electrode, so the capacitor is an energy storage electrical part. Any of two conductors that are insulated and close to each other form a capacitor. In addition, the parallel plate capacitor consists of the electrode plate and the dielectric of the capacitor.

Capacitor is one of the widely used electronic components in electronic equipment. It is widely used in stopping DC and alternating AC, coupling, bypass, filtering, tuning loop, energy conversion, control and so on. Capacitor is different from capacitance. The capacitance is the basic physical quantity, the symbol C, the unit is F (Farah).

Explanation:

I. Capacitor characteristics

II. Functions of capacitor in electrical circuits

Which of the following refers to the increasing size of deserts worldwide? A. disintegration B. desertification C. decomposition D. disaggregation

Answers

 the answer is   B. desertification 

The answer is B i just took the test and got it correct!