Examlex
In 1661, who developed a definition of element that made the concept subject to laboratory investigation?
Middle Childhood
A developmental stage in children ranging from about 6 to 12 years old, marked by increased cognitive and social skills.
Concrete Operational
A stage in cognitive development, according to Piaget, where children (around 7-11 years old) start thinking logically about concrete events but struggle with abstract concepts.
Transform Objects
The ability to change or manipulate objects in one's environment, often reflecting cognitive development and creative problem-solving skills.
Piaget
A Swiss psychologist known for his pioneering work in the study of child development, particularly his theory of cognitive development.
Q2: 6.02 × 10<sup>23</sup> is known as _.
Q9: A cola drink is a good example
Q20: The Lewis symbol would be characteristic of
Q26: An element that tends to gain or
Q28: Which element was detected in the Sun
Q34: If a negatively charged object is brought
Q65: If the energy of n = 4
Q88: _ are substances that cannot be decomposed
Q116: Addition of an electron to an atom
Q117: Which type of reaction is AlCl<sub>3</sub> +