The correct answer is
<span>requires more energy to lose an electron than a metal
In fact, the main characteristics of the metals is that they have many electrons free to move through the lattice of the material, so it is easy for a metal to gain/lose electrons. On the contrary, non-metals don't have free electrons, so more energy is required in order to rip an electron from the atoms of the material.</span>
Show us Figure 1 and we'll have the answer in a flash. Without it, not a chance. That's why it's there.
Atoms are electrically neutral because they have equal numbers of protons (positively charged) and electrons (negatively charged). If an atom gains or loses one or more electrons, it becomes an ion. If it gains one or more electrons, it now carries a net negative charge, and is thus "anionic."
Answer:
14.32 Hz
Explanation:
Given:
Frequency of the horn, f₀ = 395 Hz
Speed of the car, v = 12.0 m/s
Speed of the sound, c = 343 m/s
now, applying the doppler's effect formula, we have
where,
f is the observed frequency
on substituting the values, we get
or
f = 409.32 Hz
therefore,
the beat frequency heard is = f - f₀ = 409.32 - 395 = 14.32 Hz