At room temperature, sodium metal is so soft that it can be easily cut with a knife. In air, the bright silvery luster of freshly exposed sodium will rapidly tarnish. The density of alkali metals generally increases with increasing atomic number, but sodium is denser than potassium. Source: http://en.wikipedia.org/wiki/Sodium#Characteristics
No, traits can be both physical and non-physical. Physical traits are characteristics that are visible, such as hair color or height. Non-physical traits, on the other hand, refer to characteristics like personality, intelligence, or behavior.
physical
Slicing a pellet of sodium in half is a physical change because it does not alter the chemical composition of the sodium. The sodium is still sodium before and after slicing, just in smaller pieces.
The traits of those substances would be physical traits, also known as physical properties.
Its a physical
Physical traits is what they look like + Personality traits is what they act like
Physical Traits are traits that you see right off. For example, your eye color, hair color, your nose shape etc.
Physical traits refer to characteristics that can be observed in an individual's physical appearance, such as height, weight, eye color, hair color, and facial features. These traits are determined by a combination of genetics and environmental factors.
When sodium melts, it undergoes a physical change. This is because the change in state from solid to liquid does not alter the chemical composition of the sodium itself. It remains as sodium in both the solid and liquid states.
Sodium chloride is a chemical compound (NaCl), not a property.
Sodium chloride is a compound because it is made up of two elements, sodium and chlorine, chemically bonded together in a fixed ratio. In a compound, the constituent elements lose their individual properties and form a new substance with unique characteristics. In contrast, a mixture is a physical combination of substances that retain their individual properties and can be separated by physical means.
It is a physical change. The sodium hydroxide dissolves, but it is still sodium hydroxide.