What device do scientists use to measure radiation

what are the following?

Answer:

The steps of the scientific method go something like this: Make an observation or observations. Ask questions about the observations and gather information. Form a hypothesis, a tentative description of what's been observed, and make predictions based on that hypothesis

Explanation:

      sorta explained up there ^^

Final answer:

The first step in the scientific method is Observation, where scientists describe phenomena in the natural world. Afterwards they ask a question, form a hypothesis, conduct an experiment, and arrive at a conclusion.

Explanation:

The first step in the scientific method process is typically Observation, where scientists notice and describe phenomena that occurs in the natural world. For example, a scientist may observe that a plant does not grow taller in the absence of light. Other steps that follow include forming a question, forming a hypothesis, conducting an experiment, and drawing a conclusionbased on the results of the an  experiment.

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Answer:

D. 30 protons, 39 neutrons, 30 electrons

Explanation:

The atomic number (Z) is the number of protons (p) in the nucleus. Since

Z = 30, p = 30.

In a neutral atom, the number of electrons (e) equals the number of protons. Since p = 30, e = 30.

The mass number (A) is the number of protons plus the number of neutrons (n).

A = p + n

For an atom of zinc-69,

69 = 30 + n     Subtract 30 from each side and transpose

n = 39

Zinc has the chemical symbol Zn and the atomic number 30. D. 30 protons, 39, neutrons, 30 electrons

What is Zinc

Zinc has the chemical symbol Zn, and its atomic number is 30. This means that every atom of zinc contains 30 protons in its nucleus.

An atom of zinc-69 (Zn-69) is one that contains:

- 30 protons (since zinc has an atomic number of 30).

- 39 neutrons (subtract the atomic number from the mass number: 69 - 30 = 39).

- 30 electrons (in a neutral atom, the number of electrons is equal to the number of protons).

So, the correct option is option d 30 protons, 39 neutrons, 30 electrons.

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Answer:

2moles of H2

Explanation:

First, let us generate a balanced equation for the reaction between calcium and water. This is illustrated below:

Ca + 2H20 —> Ca(OH)2 + H2

From the equation,

2moles of H2O produced 1mole of H2.

Therefore 4moles of H2O will produce = 4/2 = 2moles of H2.

Answer:

THE ANSWER IS THE DESERTS IF UR DOING USATESTPREP HINT THINGY

Explanation: