Answer:
Hafnium
Explanation:
I'm guessing based on the sound of the name, because hafnium kind of sounds like the word half, or 50%. Hope this helps!
Doppler effect is the compression or extension of a sound wave, which causes a change in its wavelength / frequency (and so its sound).
Explanation: It is defined as the effect produced by a moving source of waves in which there is an upward shift in frequency for observers, the source is moving towards and downward shift of frequency from which the source is moving away. used to tell if an object in space is moving toward or away from us.
Answer:
Double, acid, base, water, salt.
Explanation:
The general reaction of a neutralization is:
X(OH) + YH → H₂O + XY
If you see, the reaction is a <em>double replacement reaction </em>because the cation and the anion of the two reactants switch places, forming two new compounds or products.
Always, the reaction starts with an <em>acid </em>and a <em>base </em>and will produce <em>water </em>and a <em>salt. </em>
I hope it helps!
Answer and Explanation:
Given the following chemical equation:
Cl₂(g) + F₂(g) ⇒ 2ClF(g)
The coefficients are: 1 for Cl₂, 1 for F₂ and 2 for ClF. The coefficients indicate the number of <em>units</em> of each ompound that participates in the reaction. It gives the proportion of reactants and products in the reaction. These units can be molecules or moles. In this reaction, we can say:
<u>On the particulate level</u>: 1 molecule of Cl₂(g) reacts with 1 molecule of F₂(g) to form 2 molecules of ClF(g).
<u>On the molar level</u>: 1 mol of Cl₂(g) reacts with 1 mol of F₂(g) to form 2 mol of ClF(g).
All isotopes of the
same element have the same number of protons. Number of neutrons in different
atoms of the same element is free to vary. Since, different elements react
differently, different elements have different numbers of protons. Atoms with
the same number of protons and vary neutrons behave chemically similar. The
number of electrons in a neutral atom depends on the number of protons. All
chemical reactions involve transfer or sharing of electrons it stands to reason,
neutrons are NOT responsible for chemical reactivity. It's arguable whether
protons or electrons dictate chemical reactivity <span>certainly the
SUBATOMIC nuclear particle that dictates reactivity is the PROTON.</span>