A sodium atom has 11 protons in its nucleus. The number of protons in an atom determines its atomic number, and for sodium, that atomic number is 11.
How many protons are in the nucleus of a sodium atom?
11 answers
How many valence electrons does an oxygen (O) atom have?
An oxygen (O) atom has 6 valence electrons. Oxygen is in group 16 of the periodic table, and it typically has 6 electrons in its outermost shell.
A sodium ion, Na+, has a positive charge because it
gained an electron.
lost a proton.
gained a neutron.
lost an electron.
gained an electron.
lost a proton.
gained a neutron.
lost an electron.
A sodium ion, Na\(^+\), has a positive charge because it lost an electron. When sodium loses one electron, it becomes positively charged, resulting in the Na\(^+\) ion.
Which of the following compounds results from the formation of an ionic bond?
H2O
NO2
NaCl
CO2
H2O
NO2
NaCl
CO2
The compound that results from the formation of an ionic bond is NaCl (sodium chloride). In NaCl, sodium (Na) donates an electron to chlorine (Cl), resulting in the formation of an ionic bond between the positively charged sodium ion (Na\(^+\)) and the negatively charged chloride ion (Cl\(^-\)). The other compounds listed (H\(_2\)O, NO\(_2\), and CO\(_2\)) involve covalent bonds rather than ionic bonds.
If a balloon is taken outside on a very cold day, what will occur?
The volume of the balloon will decrease.
Gas will flow into the balloon.
The volume of the balloon will increase.
The pressure inside the balloon will increase.
The volume of the balloon will decrease.
Gas will flow into the balloon.
The volume of the balloon will increase.
The pressure inside the balloon will increase.
If a balloon is taken outside on a very cold day, the volume of the balloon will decrease. This behavior can be explained by Charles's Law, which states that the volume of a gas is directly related to its temperature (when pressure is constant). As the temperature decreases, the volume of the gas inside the balloon decreases, causing the balloon to shrink.
What would happen if a scuba tank (a rigid, sealed gas cylinder) heats up?
The pressure exerted by the gas in the tank would increase.
The size of the gas particles in the tank would increase.
The number of particles in the tank would increase.
The density of the gas in the tank would increase.
The pressure exerted by the gas in the tank would increase.
The size of the gas particles in the tank would increase.
The number of particles in the tank would increase.
The density of the gas in the tank would increase.
If a scuba tank (a rigid, sealed gas cylinder) heats up, the pressure exerted by the gas in the tank would increase. According to Gay-Lussac's Law, when the temperature of a gas increases in a fixed volume (as in a rigid container), the pressure of the gas also increases. This is because the gas particles move faster at higher temperatures, leading to more frequent and forceful collisions with the walls of the tank.
1 answer